[
  {
    "question": "How many teeth does a great white shark go through in its lifetime?",
    "answer": 20000,
    "category": "biology",
    "explanation": "Great white sharks constantly replace worn or lost teeth, resulting in thousands used throughout their lives."
  },
  {
    "question": "How many cookies does the average American eat in a lifetime?",
    "answer": 35000,
    "category": "food",
    "explanation": "Studies estimate long-term eating habits across a lifespan based on annual consumption rates."
  },
  {
    "question": "How many steps does the average person walk in a lifetime?",
    "answer": 220000000,
    "category": "health",
    "explanation": "By estimating daily step counts over many decades, researchers arrive at this long-term total."
  },
  {
    "question": "How many computer viruses are released every month?",
    "answer": 60000,
    "category": "technology",
    "explanation": "Cybersecurity firms track tens of thousands of new malicious programs emerging each month."
  },
  {
    "question": "How many cells are replaced in the human body each second?",
    "answer": 20000000,
    "category": "biology",
    "explanation": "Cell turnover is constant, with millions being replaced each second to maintain bodily functions."
  },
  {
    "question": "How many gallons of water does a typical U.S. household use per day?",
    "answer": 300,
    "category": "environment",
    "explanation": "This figure combines indoor use (showers, toilets, faucets) and some outdoor watering averages."
  },
  {
    "question": "How many lines of code does the Linux kernel have?",
    "answer": 30000000,
    "category": "technology",
    "explanation": "Contributors worldwide continually expand the open-source Linux kernel, adding millions of lines."
  },
  {
    "question": "How many hours of video are uploaded to YouTube every minute?",
    "answer": 500,
    "category": "technology",
    "explanation": "User-generated content across the globe leads to hundreds of hours of new video every minute."
  },
  {
    "question": "How many meteorites bigger than a marble hit Earth's surface each year?",
    "answer": 500,
    "category": "space",
    "explanation": "Most meteors burn up in the atmosphere; only a few hundred larger fragments reach the ground."
  },
  {
    "question": "How many asteroids larger than 1 km are in the asteroid belt?",
    "answer": 1000000,
    "category": "astronomy",
    "explanation": "Telescopic observations indicate at least a million sizable rocks orbiting between Mars and Jupiter."
  },
  {
    "question": "How many lightning strikes hit the Earth every second?",
    "answer": 100,
    "category": "weather",
    "explanation": "Global storm activity results in dozens of strikes every second across different regions."
  },
  {
    "question": "How many times per second does a hummingbird’s heart beat?",
    "answer": 20,
    "category": "biology",
    "explanation": "Hummingbirds have extremely fast metabolisms, leading to rapid heart rates exceeding 1000 beats/min."
  },
  {
    "question": "How many species of flowering plants are there?",
    "answer": 369000,
    "category": "biology",
    "explanation": "Botanical surveys worldwide categorize hundreds of thousands of angiosperm species."
  },
  {
    "question": "How many new books are published worldwide every day?",
    "answer": 8000,
    "category": "literature",
    "explanation": "Global ISBN registrations and publisher data show thousands of new titles released daily."
  },
  {
    "question": "How many meteors enter Earth’s atmosphere each hour?",
    "answer": 7000,
    "category": "space",
    "explanation": "Minute space debris constantly bombard the Earth’s atmosphere, creating frequent meteoric events."
  },
  {
    "question": "How many times does the International Space Station orbit Earth per day?",
    "answer": 16,
    "category": "space",
    "explanation": "Traveling at about 28,000 km/h, the ISS completes roughly 16 orbits in 24 hours."
  },
  {
    "question": "How many new malware threats are detected daily worldwide?",
    "answer": 350000,
    "category": "technology",
    "explanation": "Cybersecurity companies identify hundreds of thousands of novel malicious programs each day."
  },
  {
    "question": "How many various dog breeds are recognized globally?",
    "answer": 340,
    "category": "biology",
    "explanation": "Major kennel clubs and organizations collectively recognize hundreds of distinct dog breeds."
  },
  {
    "question": "How many breaths does a human take in one day?",
    "answer": 20000,
    "category": "biology",
    "explanation": "Adults inhale roughly 12 to 20 times per minute, adding up to around 20,000 breaths per day."
  },
  {
    "question": "How many newborns are named every year in the United States?",
    "answer": 3600000,
    "category": "demographics",
    "explanation": "U.S. birth rates hover around 3.6 million births per year, based on census data."
  },
  {
    "question": "How many pencils can be made from one average-size cedar tree?",
    "answer": 300000,
    "category": "estimation",
    "explanation": "Manufacturers estimate that a single cedar tree can yield hundreds of thousands of pencils."
  },
  {
    "question": "How many languages have over 1 million speakers worldwide?",
    "answer": 300,
    "category": "language",
    "explanation": "Linguistic surveys show a few hundred languages each with seven-figure speaker populations."
  },
  {
    "question": "How many hairs does the average human scalp have?",
    "answer": 100000,
    "category": "biology",
    "explanation": "A typical scalp grows around 100,000 hair follicles, though density varies by individual."
  },
  {
    "question": "How many active volcanoes are on Earth at any given time?",
    "answer": 1500,
    "category": "earth_science",
    "explanation": "Volcanological records indicate there are roughly 1,500 potentially active volcanoes globally."
  },
  {
    "question": "How many years does it take the Solar System to orbit the Milky Way's center?",
    "answer": 230000000,
    "category": "astronomy",
    "explanation": "One galactic year, or ‘cosmic year,’ is about 230 million Earth years to circle the Milky Way’s core."
  },
  {
    "question": "How many people does a single dairy cow feed with its milk per day?",
    "answer": 50,
    "category": "agriculture",
    "explanation": "On average, one cow’s daily milk production can provide servings for around fifty people."
  },
  {
    "question": "How many emails does the average office worker receive per day?",
    "answer": 120,
    "category": "technology",
    "explanation": "Office employees often report receiving over a hundred emails daily in a typical work environment."
  },
  {
    "question": "How many different fish species exist in the oceans?",
    "answer": 20000,
    "category": "biology",
    "explanation": "Ichthyologists have identified thousands of fish species, with many more possibly undiscovered."
  },
  {
    "question": "How many seeds does a typical strawberry have on its surface?",
    "answer": 200,
    "category": "food",
    "explanation": "Strawberries typically have about 200 tiny seeds embedded on the outer skin."
  },
  {
    "question": "How many miles does the average driver travel in a year?",
    "answer": 13000,
    "category": "transportation",
    "explanation": "U.S. and European data suggest drivers often cover over 1,000 miles each month."
  },
  {
    "question": "How many stars can be seen by the naked eye from Earth under ideal conditions?",
    "answer": 5000,
    "category": "astronomy",
    "explanation": "Under pristine skies, thousands of stars are visible without aid, though light pollution reduces this."
  },
  {
    "question": "How many unique smells can the human nose distinguish?",
    "answer": 1000000,
    "category": "biology",
    "explanation": "Research suggests the human olfactory system can detect up to a million distinct odor combinations."
  },
  {
    "question": "How many times does a typical car engine fire in one minute at idle?",
    "answer": 600,
    "category": "transportation",
    "explanation": "At idle (about 600 RPM), each cylinder fires once every two revolutions of the crankshaft."
  },
  {
    "question": "How many liftoffs has NASA’s Space Shuttle program conducted in total?",
    "answer": 135,
    "category": "space",
    "explanation": "The Space Shuttle program ran from 1981 to 2011, completing 135 missions."
  },
  {
    "question": "How many proteins can be found in the human body?",
    "answer": 1000000,
    "category": "biology",
    "explanation": "Scientists estimate up to a million unique protein structures may exist across human cells."
  },
  {
    "question": "How many chemical elements are officially recognized?",
    "answer": 118,
    "category": "chemistry",
    "explanation": "The IUPAC periodically updates the periodic table, which currently has 118 confirmed elements."
  },
  {
    "question": "How many golf balls are produced worldwide each year?",
    "answer": 1200000000,
    "category": "sports",
    "explanation": "Global demand and recreational use drive the production of over a billion golf balls annually."
  },
  {
    "question": "How many different dog and cat videos are posted online daily worldwide?",
    "answer": 2000000,
    "category": "technology",
    "explanation": "Pet-related social media content is extremely popular, reaching millions of daily uploads."
  },
  {
    "question": "How many seeds can a single sunflower head produce?",
    "answer": 2000,
    "category": "biology",
    "explanation": "Large sunflowers commonly hold hundreds to a couple thousand seeds in each bloom."
  },
  {
    "question": "How many microseconds does it take for a computer to read from RAM?",
    "answer": 100,
    "category": "technology",
    "explanation": "Random-access memory access times are typically measured in tens to hundreds of nanoseconds."
  },
  {
    "question": "How many glasses of water does an average person drink each year?",
    "answer": 1000,
    "category": "health",
    "explanation": "Based on daily recommended intake, individuals consume about a thousand glasses annually."
  },
  {
    "question": "How many gallons of coffee do Americans consume per year?",
    "answer": 4000000000,
    "category": "food",
    "explanation": "High coffee consumption in the U.S. leads to billions of gallons per year collectively."
  },
  {
    "question": "How many new startups are founded worldwide each day?",
    "answer": 2000,
    "category": "business",
    "explanation": "Entrepreneurship data and registration records suggest roughly 2,000 new companies form daily."
  },
  {
    "question": "How many different dialects are spoken in China?",
    "answer": 200,
    "category": "language",
    "explanation": "Besides Mandarin, there are many mutually unintelligible Chinese dialects and language variants."
  },
  {
    "question": "How many taste receptors do catfish have on their bodies?",
    "answer": 100000,
    "category": "biology",
    "explanation": "Catfish have chemoreceptors scattered across their skin and barbels, amplifying their sense of taste."
  },
  {
    "question": "How many mummies were created in ancient Egypt over millennia?",
    "answer": 70000000,
    "category": "history",
    "explanation": "Mummification was a widespread practice over centuries, yielding tens of millions of remains."
  },
  {
    "question": "How many disintegrations of Polonium-210 occur per second in 1 gram?",
    "answer": 166000000000000,
    "category": "physics",
    "explanation": "Polonium-210 is highly radioactive, showing extremely high decay rates in a small mass."
  },
  {
    "question": "How many bacterial cells are on a human hand at any moment?",
    "answer": 1500000,
    "category": "biology",
    "explanation": "The skin harbors a microbiome of roughly millions of bacterial cells, varying with conditions."
  },
  {
    "question": "How many brain cells does an octopus have?",
    "answer": 500000000,
    "category": "biology",
    "explanation": "Octopuses possess a highly developed nervous system, with half a billion neurons spread throughout limbs."
  },
  {
    "question": "How many liters of water does the average shower use per minute?",
    "answer": 9,
    "category": "environment",
    "explanation": "Typical showerheads in many countries flow at about 2.5 gallons (9 liters) per minute."
  },
  {
    "question": "How many times can a honeybee flap its wings per second?",
    "answer": 200,
    "category": "biology",
    "explanation": "Honeybee wings beat rapidly to maintain flight, typically 200 or more flaps per second."
  },
  {
    "question": "How many hot dogs are consumed in the U.S. each year?",
    "answer": 20000000000,
    "category": "food",
    "explanation": "Popular at barbecues and sports events, hot dog consumption reaches tens of billions annually."
  },
  {
    "question": "How many photos are uploaded to Facebook every day?",
    "answer": 350000000,
    "category": "technology",
    "explanation": "With billions of users, Facebook sees hundreds of millions of image uploads daily."
  },
  {
    "question": "How many words does the average person speak in a lifetime?",
    "answer": 80000000,
    "category": "language",
    "explanation": "Long-term estimates of daily spoken vocabulary extrapolate to tens of millions of words."
  },
  {
    "question": "How many ants are estimated to exist on Earth in total?",
    "answer": 20000000000000000,
    "category": "biology",
    "explanation": "Biomass studies show enormous global ant populations, estimated at 10+ quadrillions."
  },
  {
    "question": "How many chickens are alive on Earth at any moment?",
    "answer": 25000000000,
    "category": "agriculture",
    "explanation": "Chickens are the most populous bird on Earth, due to high demand for poultry and eggs."
  },
  {
    "question": "How many cells make up the average apple?",
    "answer": 50000000,
    "category": "biology",
    "explanation": "Apples consist of millions of plant cells; the exact count varies by size and variety."
  },
  {
    "question": "How many distinct coins does the U.S. Mint produce each year?",
    "answer": 11000000000,
    "category": "currency",
    "explanation": "Annual U.S. Mint coin production can exceed ten billion coins across denominations."
  },
  {
    "question": "How many lines of DNA code does a typical bacterium have?",
    "answer": 4000000,
    "category": "biology",
    "explanation": "Common bacterial genomes are a few million base pairs, forming the organism’s genetic blueprint."
  },
  {
    "question": "How many passengers does the world's busiest airport handle each year?",
    "answer": 100000000,
    "category": "transportation",
    "explanation": "Air traffic data show certain global hubs each see around 100 million passengers annually."
  },
  {
    "question": "How many Lego bricks have been manufactured since their creation?",
    "answer": 600000000000,
    "category": "estimation",
    "explanation": "Lego has produced hundreds of billions of bricks since the mid-20th century."
  },
  {
    "question": "How many water molecules are in one teaspoon of water?",
    "answer": 200000000000000000000,
    "category": "chemistry",
    "explanation": "Using Avogadro’s number, a small volume of water contains an astronomically high number of molecules."
  },
  {
    "question": "How many times does the average person blink in a year?",
    "answer": 10512000,
    "category": "biology",
    "explanation": "At roughly 10–20 blinks per minute, this adds up to millions of blinks annually."
  },
  {
    "question": "How many satellites does GPS rely on in total?",
    "answer": 31,
    "category": "technology",
    "explanation": "The U.S. Global Positioning System typically has a constellation of around 30 active satellites."
  },
  {
    "question": "How many people are airborne on planes worldwide at any moment?",
    "answer": 500000,
    "category": "transportation",
    "explanation": "At any given time, roughly half a million passengers are estimated to be in the skies globally."
  },
  {
    "question": "How many bits of information does the human brain process per second?",
    "answer": 11000000,
    "category": "biology",
    "explanation": "Estimates vary, but the subconscious mind handles millions of bits of sensory data each second."
  },
  {
    "question": "How many Google searches are performed per second?",
    "answer": 99000,
    "category": "technology",
    "explanation": "Google’s search engine handles tens of thousands of queries every second worldwide."
  },
  {
    "question": "How many operational aircraft carriers are there in the world?",
    "answer": 44,
    "category": "military",
    "explanation": "Naval data indicate fewer than 50 active, commissioned carriers exist among various navies."
  },
  {
    "question": "How many muscles do humans use to take a single step?",
    "answer": 200,
    "category": "biology",
    "explanation": "Walking engages a large number of muscles in the legs, core, and stabilizing groups."
  },
  {
    "question": "How many microseconds does it take for a light signal to travel 1 km in a vacuum?",
    "answer": 3,
    "category": "physics",
    "explanation": "Light travels 300,000 km/s, so it covers 1 km in roughly 3 microseconds."
  },
  {
    "question": "How many planets have been discovered outside our Solar System (exoplanets)?",
    "answer": 5300,
    "category": "astronomy",
    "explanation": "Astronomers confirm thousands of exoplanets, with many more candidates pending verification."
  },
  {
    "question": "How many times per second does a ruby-throated hummingbird's wings beat?",
    "answer": 53,
    "category": "biology",
    "explanation": "This small species flaps its wings around 50 times per second, crucial for hovering."
  },
  {
    "question": "How many odor receptors do dogs have compared to humans?",
    "answer": 50,
    "category": "biology",
    "explanation": "Dogs can have about 50 times as many scent receptors, giving them a far superior sense of smell."
  },
  {
    "question": "How many cups of tea are consumed daily worldwide?",
    "answer": 3000000000,
    "category": "food",
    "explanation": "Tea is the second most-consumed beverage after water, reaching billions of cups daily."
  },
  {
    "question": "How many pages of text can be stored on a 1 TB hard drive?",
    "answer": 2000000000,
    "category": "technology",
    "explanation": "By approximating an average page size, 1 TB can theoretically store billions of pages of text."
  },
  {
    "question": "How many items does the average supermarket carry?",
    "answer": 40000,
    "category": "commerce",
    "explanation": "Modern supermarkets offer tens of thousands of products, spanning numerous categories."
  },
  {
    "question": "How many bones does a giraffe have in its neck?",
    "answer": 7,
    "category": "biology",
    "explanation": "Despite their length, giraffes have seven cervical vertebrae, just like most mammals."
  },
  {
    "question": "How many plastic bottles are used globally every minute?",
    "answer": 1000000,
    "category": "environment",
    "explanation": "Rapid bottled water consumption drives the use of millions of plastic bottles per minute."
  },
  {
    "question": "How many official languages does the European Union recognize?",
    "answer": 24,
    "category": "language",
    "explanation": "The EU maintains 24 official languages for member states' legislative and administrative use."
  },
  {
    "question": "How many passengers travel by train in India each day?",
    "answer": 23000000,
    "category": "transportation",
    "explanation": "Indian Railways, one of the largest networks, moves tens of millions of passengers daily."
  },
  {
    "question": "How many radioactive decays occur in the human body per second?",
    "answer": 7000,
    "category": "biology",
    "explanation": "Naturally occurring isotopes like potassium-40 lead to thousands of decays in the body each second."
  },
  {
    "question": "How many dominoes are needed to set a new large-scale domino toppling record?",
    "answer": 5000000,
    "category": "games",
    "explanation": "Record-breaking attempts require millions of dominoes arranged in complex patterns."
  },
  {
    "question": "How many times do a blue whale’s heartbeats register per minute at the surface?",
    "answer": 12,
    "category": "biology",
    "explanation": "Blue whales have the slowest heart rates among mammals, sometimes dropping even lower when diving."
  },
  {
    "question": "How many chemical reactions occur in each human cell per second?",
    "answer": 1000000,
    "category": "biology",
    "explanation": "Cellular metabolism involves countless biochemical processes happening continuously."
  },
  {
    "question": "How many nuclear power reactors are operational worldwide?",
    "answer": 420,
    "category": "energy",
    "explanation": "Various nations operate a few hundred reactors, mostly for electricity generation."
  },
  {
    "question": "How many Earth-like planets could exist in the Milky Way?",
    "answer": 60000000000,
    "category": "astronomy",
    "explanation": "Surveys of exoplanets suggest tens of billions may be in habitable zones around stars."
  },
  {
    "question": "How many distinct scripts are in use around the world?",
    "answer": 100,
    "category": "language",
    "explanation": "Various cultures utilize about a hundred major writing systems, from Latin to Devanagari."
  },
  {
    "question": "How many frames are in a typical 2-hour Hollywood movie?",
    "answer": 172800,
    "category": "entertainment",
    "explanation": "At 24 frames per second, a two-hour film runs through over 170,000 frames total."
  },
  {
    "question": "How many seeds does a pomegranate typically contain?",
    "answer": 600,
    "category": "food",
    "explanation": "Pomegranates often have hundreds of arils (seed casings) inside each fruit."
  },
  {
    "question": "How many times has Mount Everest been summited?",
    "answer": 11000,
    "category": "exploration",
    "explanation": "Since the first ascent in 1953, thousands of climbers have reached Everest’s summit multiple times."
  },
  {
    "question": "How many goats are there worldwide?",
    "answer": 1000000000,
    "category": "agriculture",
    "explanation": "Goat herds, prominent in many regions, total around a billion animals globally."
  },
  {
    "question": "How many surgeries are performed worldwide each year?",
    "answer": 310000000,
    "category": "health",
    "explanation": "Global health statistics indicate hundreds of millions of surgical procedures annually."
  },
  {
    "question": "How many cells are in an adult mouse’s body?",
    "answer": 10000000000,
    "category": "biology",
    "explanation": "Studies in model organisms show the adult mouse has tens of billions of cells."
  },
  {
    "question": "How many distinct valid configurations exist for a Rubik’s Cube?",
    "answer": 43252003274489856000,
    "category": "games",
    "explanation": "A classic result shows there are over 43 quintillion legal permutations of the cube’s faces."
  },
  {
    "question": "How many phone calls are made worldwide each day?",
    "answer": 120000000000,
    "category": "technology",
    "explanation": "Global telecommunications infrastructure supports billions of calls daily."
  },
  {
    "question": "How many animals live on farms in the U.S. at any time?",
    "answer": 10000000000,
    "category": "agriculture",
    "explanation": "Livestock on U.S. farms, including poultry, swine, and cattle, number in the billions."
  },
  {
    "question": "How many bowls of instant noodles are consumed worldwide each year?",
    "answer": 116000000000,
    "category": "food",
    "explanation": "Instant noodle popularity spans countless cultures, tallying over 100 billion servings annually."
  },
  {
    "question": "How many cocoa beans are needed to make one pound of chocolate?",
    "answer": 400,
    "category": "food",
    "explanation": "Around 400 processed cacao beans are typically required to yield a pound of finished chocolate."
  },
  {
    "question": "How many items does Amazon ship per day globally?",
    "answer": 15000000,
    "category": "commerce",
    "explanation": "Amazon’s massive global logistics network delivers millions of packages daily."
  },
  {
    "question": "How many helium balloons would it take to lift an average human off the ground?",
    "answer": 2000,
    "category": "estimation",
    "explanation": "Estimates assume each latex balloon can provide about 14 grams of lift; thousands are needed for a person."
  },
  {
    "question": "How many germs exist in the average kitchen sponge?",
    "answer": 82000000000,
    "category": "health",
    "explanation": "Moist, porous sponges harbor massive bacterial colonies if not sanitized."
  },
  {
    "question": "How many passenger cars are produced worldwide each year?",
    "answer": 70000000,
    "category": "transportation",
    "explanation": "Global auto manufacturing data typically surpasses 70 million new passenger cars annually."
  },
  {
    "question": "How many leaves does a mature oak tree produce in a season?",
    "answer": 200000,
    "category": "environment",
    "explanation": "Large oak trees can hold hundreds of thousands of leaves in their full canopy."
  },
  {
    "question": "How many hotdogs are eaten at the average baseball game in the U.S.?",
    "answer": 18000000,
    "category": "food",
    "explanation": "Annual MLB concession sales report tens of millions of hotdogs sold throughout the season."
  },
  {
    "question": "How many pieces of space junk larger than 1 cm are orbiting Earth?",
    "answer": 1000000,
    "category": "space",
    "explanation": "Satellites, rocket bodies, and debris fragments contribute to large amounts of orbital debris."
  },
  {
    "question": "How many hours of programming does Netflix users stream per day worldwide?",
    "answer": 1000000000,
    "category": "entertainment",
    "explanation": "Global subscriber counts and watch-time data suggest a billion hours streamed daily."
  },
  {
    "question": "How many people die of snakebites globally each year?",
    "answer": 80000,
    "category": "health",
    "explanation": "WHO estimates indicate tens of thousands of deaths annually from venomous snakebites worldwide."
  },
  {
    "question": "How many kilowatt-hours of electricity does a typical U.S. household use per year?",
    "answer": 11000,
    "category": "energy",
    "explanation": "Energy Information Administration data places average residential consumption at around 11,000 kWh/yr."
  },
  {
    "question": "How many working satellites does SpaceX Starlink aim to deploy?",
    "answer": 42000,
    "category": "space",
    "explanation": "SpaceX has filed plans for tens of thousands of Starlink internet satellites."
  },
  {
    "question": "How many electrons flow in one second in a typical smartphone charger?",
    "answer": 1000000000000000000,
    "category": "physics",
    "explanation": "A modest current can involve quintillions of electrons per second flowing through the circuit."
  },
  {
    "question": "How many different species of cockroaches exist worldwide?",
    "answer": 4600,
    "category": "biology",
    "explanation": "Only a few species are household pests; most roaches reside in wild ecosystems."
  },
  {
    "question": "How many photos are taken globally each year?",
    "answer": 1400000000000,
    "category": "technology",
    "explanation": "Prolific smartphone usage means over a trillion photos are captured annually."
  },
  {
    "question": "How many squares can be formed on a standard 8x8 chessboard (counting all subsquares)?",
    "answer": 204,
    "category": "games",
    "explanation": "The formula for counting all square subregions in an 8x8 grid yields 204 total squares."
  },
  {
    "question": "How many hairs can be found on a square inch of a healthy scalp?",
    "answer": 150,
    "category": "biology",
    "explanation": "Hair follicle density can range around 100–200 per square inch on average."
  },
  {
    "question": "How many satellites are launched globally each year?",
    "answer": 2000,
    "category": "space",
    "explanation": "Advances in commercial space projects have drastically increased the annual satellite count."
  },
  {
    "question": "How many lines of code are in major 3D video games?",
    "answer": 5000000,
    "category": "technology",
    "explanation": "Modern AAA titles can have several million lines of code for rendering, physics, and gameplay."
  },
  {
    "question": "How many watermelons are produced worldwide each year?",
    "answer": 100000000,
    "category": "food",
    "explanation": "Global agriculture data shows watermelons are grown in huge quantities annually."
  },
  {
    "question": "How many muscle fibers does a house cat’s whisker have at its base?",
    "answer": 200,
    "category": "biology",
    "explanation": "Specialized follicle muscles and nerve endings give whiskers high sensitivity."
  },
  {
    "question": "How many tennis racquets are sold globally each year?",
    "answer": 10000000,
    "category": "sports",
    "explanation": "Market reports estimate millions of racquets purchased annually, spanning amateur to pro levels."
  },
  {
    "question": "How many cranial nerves do humans have?",
    "answer": 12,
    "category": "biology",
    "explanation": "Cranial nerves I–XII control sensory and motor functions, including smell, vision, and facial movement."
  },
  {
    "question": "How many piano tuners are there in the city of Chicago (famous Fermi example)?",
    "answer": 150,
    "category": "estimation",
    "explanation": "A classic Fermi estimation problem uses population and frequency-of-tuning assumptions to approximate 150."
  },
  {
    "question": "How many cats are kept as pets worldwide?",
    "answer": 600000000,
    "category": "demographics",
    "explanation": "Cats rank among the most popular pets globally, with hundreds of millions living in homes."
  },
  {
    "question": "How many times can paper be folded in half before it’s nearly impossible to continue?",
    "answer": 7,
    "category": "estimation",
    "explanation": "Physical constraints and exponential thickness growth make further folds extremely difficult."
  },
  {
    "question": "How many lines of code does a modern smartphone operating system contain?",
    "answer": 20000000,
    "category": "technology",
    "explanation": "Mobile OS platforms incorporate millions of lines, including drivers, UI, and security components."
  },
  {
    "question": "How many bones are in a python’s body?",
    "answer": 600,
    "category": "biology",
    "explanation": "Snakes have numerous vertebrae along their spinal columns, leading to hundreds of bones."
  },
  {
    "question": "How many new words are coined in English each year?",
    "answer": 1000,
    "category": "language",
    "explanation": "Linguists note English adds many neologisms, some ephemeral, some adopted into dictionaries."
  },
  {
    "question": "How many times bigger than Earth is Jupiter by volume?",
    "answer": 1300,
    "category": "astronomy",
    "explanation": "Jupiter’s huge gaseous bulk can contain over a thousand Earths by volume."
  },
  {
    "question": "How many Shakespearean sonnets were written by William Shakespeare?",
    "answer": 154,
    "category": "literature",
    "explanation": "Shakespeare’s published collection includes 154 sonnets, plus longer narrative poems."
  },
  {
    "question": "How many times does the Earth’s magnetic field flip over a million years?",
    "answer": 4,
    "category": "earth_science",
    "explanation": "Geomagnetic reversals occur irregularly, but on average a few flips happen each million years."
  },
  {
    "question": "How many pairs of jeans are sold worldwide each year?",
    "answer": 2000000000,
    "category": "commerce",
    "explanation": "Denim’s ongoing popularity results in billions of jeans sold annually across the globe."
  },
  {
    "question": "How many living things are on your skin at any moment (bacteria, fungi, mites)?",
    "answer": 1000000,
    "category": "biology",
    "explanation": "The human skin microbiome hosts millions of microorganisms that coexist with us."
  },
  {
    "question": "How many named craters are there on the Moon?",
    "answer": 9100,
    "category": "astronomy",
    "explanation": "Lunar maps label thousands of craters, recognized by agencies like the IAU."
  },
  {
    "question": "How many annual visits does Paris receive from tourists?",
    "answer": 38000000,
    "category": "tourism",
    "explanation": "Paris consistently ranks among the top tourist destinations, attracting tens of millions yearly."
  },
  {
    "question": "How many new blockchain wallets are created daily?",
    "answer": 200000,
    "category": "technology",
    "explanation": "Cryptocurrency adoption drives the creation of hundreds of thousands of new wallets daily."
  },
  {
    "question": "How many nerve endings are in the human foot?",
    "answer": 200000,
    "category": "biology",
    "explanation": "Feet contain a high concentration of sensory receptors to aid in balance and tactile response."
  },
  {
    "question": "How many different viruses infect humans worldwide?",
    "answer": 200,
    "category": "health",
    "explanation": "At least a couple hundred human-infecting viruses have been described, with more emerging."
  },
  {
    "question": "How many tigers live in the wild globally?",
    "answer": 3900,
    "category": "environment",
    "explanation": "Conservation estimates place the wild tiger population under 4,000, spread across Asia."
  },
  {
    "question": "How many Earths would fit across the diameter of the Sun?",
    "answer": 109,
    "category": "astronomy",
    "explanation": "The Sun’s diameter of about 1.39 million km is over a hundred times larger than Earth’s."
  },
  {
    "question": "How many different proteins are in a single human cell?",
    "answer": 10000,
    "category": "biology",
    "explanation": "Individual cells express thousands of proteins at varying levels, crucial for cellular function."
  },
  {
    "question": "How many lines can be drawn between 10 distinct points?",
    "answer": 45,
    "category": "mathematics",
    "explanation": "Using combinatorics (C(10,2) = 45), one calculates all possible straight lines among 10 points."
  },
  {
    "question": "How many segments does a tapeworm typically have?",
    "answer": 2000,
    "category": "biology",
    "explanation": "Tapeworms grow long, ribbon-like bodies composed of hundreds or thousands of proglottid segments."
  },
  {
    "question": "How many minutes of commercials does the average American watch daily?",
    "answer": 40,
    "category": "entertainment",
    "explanation": "TV viewing data suggests nearly an hour of ads per day, but estimates vary with streaming habits."
  },
  {
    "question": "How many plastic bags are used worldwide each year?",
    "answer": 1000000000000,
    "category": "environment",
    "explanation": "Despite bans and reductions, global plastic bag usage still reaches around a trillion annually."
  },
  {
    "question": "How many active email addresses exist worldwide?",
    "answer": 5600000000,
    "category": "technology",
    "explanation": "Global internet penetration results in billions of active email accounts across providers."
  },
  {
    "question": "How many rings does Saturn have if counting major ring divisions?",
    "answer": 7,
    "category": "astronomy",
    "explanation": "Saturn’s ring system is divided into seven main sections labeled A through G."
  },
  {
    "question": "How many Arctic terns complete the migratory round trip each year?",
    "answer": 2000000,
    "category": "biology",
    "explanation": "Arctic terns undertake one of the longest migrations, traveling from polar to polar regions."
  },
  {
    "question": "How many people run the New York City Marathon each year?",
    "answer": 50000,
    "category": "sports",
    "explanation": "The NYC Marathon is the world’s largest, drawing tens of thousands of finishers annually."
  },
  {
    "question": "How many known species of spiders exist worldwide?",
    "answer": 49000,
    "category": "biology",
    "explanation": "Arachnologists classify tens of thousands of spider species, with many not yet documented."
  },
  {
    "question": "How many neurons does a small fruit fly have?",
    "answer": 100000,
    "category": "biology",
    "explanation": "Drosophila melanogaster, a model organism, packs around 100,000 neurons in its tiny brain."
  },
  {
    "question": "How many functional satellites does the European Space Agency (ESA) operate?",
    "answer": 20,
    "category": "space",
    "explanation": "ESA runs roughly a couple dozen active missions, though the exact count varies over time."
  },
  {
    "question": "How many liters of water does it take to produce 1 kg of cotton?",
    "answer": 20000,
    "category": "environment",
    "explanation": "Cotton cultivation is water-intensive, requiring tens of thousands of liters per kilogram."
  },
  {
    "question": "How many people does Disneyland in California attract each year?",
    "answer": 18000000,
    "category": "tourism",
    "explanation": "Annual attendance at Disneyland hovers around 18 million visitors."
  },
  {
    "question": "How many vertebrae does a sloth have in its neck?",
    "answer": 9,
    "category": "biology",
    "explanation": "Sloths are unusual among mammals for having extra cervical vertebrae, aiding rotation."
  },
  {
    "question": "How many nerve cells are there in the retina of each eye?",
    "answer": 100000000,
    "category": "biology",
    "explanation": "The human retina contains photoreceptors and neurons totaling hundreds of millions."
  },
  {
    "question": "How many grams of sugar does the average American consume each day?",
    "answer": 100,
    "category": "health",
    "explanation": "Surveys show daily sugar intake often exceeds recommended levels, averaging around 100g."
  },
  {
    "question": "How many recognized constellations are there in modern astronomy?",
    "answer": 88,
    "category": "astronomy",
    "explanation": "The International Astronomical Union (IAU) designates 88 official constellations in the sky."
  },
  {
    "question": "How many websites are on the Internet?",
    "answer": 1700000000,
    "category": "technology",
    "explanation": "Internet domain tracking counts well over a billion active and inactive sites globally."
  },
  {
    "question": "How many fragments of microplastic might be in a typical bottle of water?",
    "answer": 300,
    "category": "health",
    "explanation": "Studies have found numerous tiny plastic particles per liter in bottled water samples."
  },
  {
    "question": "How many times does a standard washing machine spin per minute on high?",
    "answer": 1200,
    "category": "home",
    "explanation": "High-efficiency washers can spin at 1000–1200 RPM to remove excess water from clothes."
  },
  {
    "question": "How many stamps does the U.S. Postal Service print each year?",
    "answer": 12000000000,
    "category": "commerce",
    "explanation": "Billions of stamps are produced and circulated annually for postal mail usage."
  },
  {
    "question": "How many hectares of forest are lost globally each year?",
    "answer": 10000000,
    "category": "environment",
    "explanation": "Deforestation estimates from the FAO show millions of hectares lost annually."
  },
  {
    "question": "How many lines of code does Google’s search engine infrastructure contain?",
    "answer": 2000000000,
    "category": "technology",
    "explanation": "Large-scale, distributed systems at Google are believed to contain billions of lines of code."
  },
  {
    "question": "How many hours of sunshine does the Sahara Desert receive yearly?",
    "answer": 4000,
    "category": "geography",
    "explanation": "The Sahara is among the sunniest regions, averaging around 4,000 hours of sunlight annually."
  },
  {
    "question": "How many windows does the Empire State Building have?",
    "answer": 6500,
    "category": "architecture",
    "explanation": "The iconic skyscraper’s tall facade includes thousands of windows across its 102 floors."
  },
  {
    "question": "How many galaxies could the James Webb Space Telescope see in a single deep field image?",
    "answer": 50000,
    "category": "astronomy",
    "explanation": "High-sensitivity instruments detect tens of thousands of faint, distant galaxies in deep field shots."
  },
  {
    "question": "How many lines does the average phone call take on a standard phone bill itemization?",
    "answer": 10,
    "category": "technology",
    "explanation": "Detailed phone bills often show call time, date, duration, fees, and other info, totaling about 10 lines."
  },
  {
    "question": "How many weeks are in a typical human pregnancy?",
    "answer": 40,
    "category": "biology",
    "explanation": "Human gestation lasts roughly 280 days from the last menstrual period, which is about 40 weeks."
  },
  {
    "question": "How many tiles are on the roof of the Sydney Opera House?",
    "answer": 1056000,
    "category": "architecture",
    "explanation": "The Opera House features over a million glossy white and matte cream ceramic tiles."
  },
  {
    "question": "How many surgeries are performed each year in the U.S.?",
    "answer": 50000000,
    "category": "health",
    "explanation": "Medical statistics show tens of millions of inpatient and outpatient operations annually."
  },
  {
    "question": "How many teeth does an adult horse have?",
    "answer": 40,
    "category": "biology",
    "explanation": "Mature male horses typically have 40 teeth, although mares can have fewer."
  },
  {
    "question": "How many flights does the average commercial airplane make in its lifetime?",
    "answer": 20000,
    "category": "transportation",
    "explanation": "Commercial jets can have many flight cycles over decades of operation before retirement."
  },
  {
    "question": "How many trees exist on Earth in total?",
    "answer": 3000000000000,
    "category": "environment",
    "explanation": "Recent satellite data suggests trillions of trees, though large-scale deforestation affects that number."
  },
  {
    "question": "How many plastic straws are used in the United States each day?",
    "answer": 500000000,
    "category": "environment",
    "explanation": "Despite campaigns to reduce usage, Americans still use hundreds of millions of plastic straws daily."
  },
  {
    "question": "How many trains run daily on the world’s largest railway network?",
    "answer": 30000,
    "category": "transportation",
    "explanation": "Busy global networks see tens of thousands of trains in operation each day."
  },
  {
    "question": "How many zebras roam in the Serengeti migration?",
    "answer": 200000,
    "category": "biology",
    "explanation": "Along with wildebeests, large zebra populations migrate seasonally across East Africa."
  },
  {
    "question": "How many centimeters does a person’s hair grow each year on average?",
    "answer": 15,
    "category": "biology",
    "explanation": "Hair generally grows about 1.25 cm per month, totaling around 15 cm annually."
  },
  {
    "question": "How many cells in the human body are replaced each day?",
    "answer": 50000000000,
    "category": "biology",
    "explanation": "Massive numbers of cells die and are replaced daily, including skin and gut lining cells."
  },
  {
    "question": "How many miles of coastline does Canada have?",
    "answer": 151000,
    "category": "geography",
    "explanation": "Canada, bordered by three oceans, has the world’s longest coastline at about 243,000 km."
  },
  {
    "question": "How many nerve signals are sent by the spinal cord per second?",
    "answer": 1000000000,
    "category": "biology",
    "explanation": "Vast networks of neurons relay billions of signals between the brain and body every second."
  },
  {
    "question": "How many lines of text are in the complete works of Shakespeare?",
    "answer": 30000,
    "category": "literature",
    "explanation": "Compilations of Shakespeare’s plays and poems total around thirty thousand lines overall."
  },
  {
    "question": "How many polio cases are reported annually now, worldwide?",
    "answer": 100,
    "category": "health",
    "explanation": "Global vaccination efforts have drastically reduced polio, leaving under a few hundred cases annually."
  },
  {
    "question": "How many times more powerful is a large earthquake than a minor one on the Richter scale?",
    "answer": 1000,
    "category": "earth_science",
    "explanation": "Each whole number step on the logarithmic Richter scale corresponds to about 31.6× more energy; large vs. minor can be ~1000×."
  },
  {
    "question": "How many asteroids near Earth are tracked by scientists?",
    "answer": 30000,
    "category": "astronomy",
    "explanation": "Astronomers keep tabs on thousands of near-Earth objects that come within certain thresholds."
  },
  {
    "question": "How many known exoplanet candidates are there?",
    "answer": 9000,
    "category": "astronomy",
    "explanation": "In addition to confirmed exoplanets, thousands more remain classified as candidates pending confirmation."
  },
  {
    "question": "How many fish are caught worldwide each year (in metric tons)?",
    "answer": 80000000,
    "category": "agriculture",
    "explanation": "Global capture fisheries yield tens of millions of metric tons of fish every year."
  },
  {
    "question": "How many lines of code does a modern car’s software contain?",
    "answer": 100000000,
    "category": "technology",
    "explanation": "Vehicles now feature complex infotainment, driver assistance, and control systems reaching nine-digit code lines."
  },
  {
    "question": "How many unique odors are recognized by perfume experts?",
    "answer": 3000,
    "category": "chemistry",
    "explanation": "Professional ‘noses’ are trained to identify thousands of distinct fragrance components."
  },
  {
    "question": "How many bus routes run daily in London?",
    "answer": 700,
    "category": "transportation",
    "explanation": "Transport for London operates hundreds of bus routes across the city, connecting boroughs."
  },
  {
    "question": "How many scent receptors does a typical ant have?",
    "answer": 400,
    "category": "biology",
    "explanation": "Ants rely on keen chemical detection for colony communication, facilitated by numerous receptors."
  },
  {
    "question": "How many asteroids pass within the Moon’s orbit each year?",
    "answer": 30,
    "category": "astronomy",
    "explanation": "Occasionally, near-Earth asteroids cross inside the lunar distance, noted by watchful observatories."
  },
  {
    "question": "How many musical notes does a modern piano span in total (black + white keys)?",
    "answer": 88,
    "category": "music",
    "explanation": "Standard pianos have 88 keys: 52 white and 36 black, covering a little over seven octaves."
  },
  {
    "question": "How many wings does a bee have?",
    "answer": 4,
    "category": "biology",
    "explanation": "Bees typically have two pairs of wings, though the front and rear wings are often hooked together."
  },
  {
    "question": "How many tons of bananas are produced worldwide each year?",
    "answer": 116000000,
    "category": "agriculture",
    "explanation": "Bananas are a top fruit crop, yielding over 100 million metric tons annually."
  },
  {
    "question": "How many bones does a shark have?",
    "answer": 0,
    "category": "biology",
    "explanation": "Sharks have cartilaginous skeletons, meaning they lack true bone tissue entirely."
  },
  {
    "question": "How many hearts does an octopus have?",
    "answer": 3,
    "category": "biology",
    "explanation": "Octopuses possess three hearts, with two pumping blood to the gills and one circulating it elsewhere."
  },
  {
    "question": "How many species of birds are there worldwide?",
    "answer": 10600,
    "category": "biology",
    "explanation": "Ornithological surveys recognize over ten thousand bird species globally."
  },
  {
    "question": "How many genes does the SARS-CoV-2 virus contain?",
    "answer": 15,
    "category": "health",
    "explanation": "The coronavirus genome is relatively small, encoding about 15 non-overlapping genes."
  },
  {
    "question": "How many satellites does China have in orbit?",
    "answer": 400,
    "category": "space",
    "explanation": "China’s rapidly growing space program has launched hundreds of satellites for various purposes."
  },
  {
    "question": "How many pieces of LEGO does the average child own?",
    "answer": 500,
    "category": "estimation",
    "explanation": "Longtime Lego fans often accumulate hundreds of bricks and specialized pieces over childhood."
  },
  {
    "question": "How many new apps are added to major app stores each day?",
    "answer": 3000,
    "category": "technology",
    "explanation": "Mobile app ecosystems see thousands of new submissions daily across iOS and Android platforms."
  },
  {
    "question": "How many leaves does a mature maple tree produce?",
    "answer": 200000,
    "category": "environment",
    "explanation": "Maple trees with large canopies can produce hundreds of thousands of leaves each growing season."
  },
  {
    "question": "How many centimeters can a bamboo plant grow in one day under ideal conditions?",
    "answer": 90,
    "category": "biology",
    "explanation": "Some bamboo species are known for rapid growth, up to several centimeters daily."
  },
  {
    "question": "How many shifts do honeybees work per day in a large hive?",
    "answer": 3,
    "category": "biology",
    "explanation": "The hive is active around the clock with worker bees rotating tasks like foraging and brood care."
  },
  {
    "question": "How many molecules of oxygen are in one breath of air?",
    "answer": 1e22,
    "category": "chemistry",
    "explanation": "Each human breath contains tens of quintillions of molecules, mostly nitrogen and oxygen."
  },
  {
    "question": "How many nuclear warheads exist globally?",
    "answer": 13000,
    "category": "military",
    "explanation": "Arsenal counts across nuclear-armed states remain in the low tens of thousands collectively."
  },
  {
    "question": "How many taste buds does a butterfly have on its feet?",
    "answer": 2000,
    "category": "biology",
    "explanation": "Like many insects, butterflies taste via chemoreceptors in their feet to find suitable food sources."
  },
  {
    "question": "How many ostrich eggs equal the weight of one average human adult?",
    "answer": 24,
    "category": "biology",
    "explanation": "An ostrich egg can weigh around 3 pounds; roughly two dozen match the mass of an adult."
  },
  {
    "question": "How many new emojis are approved each year?",
    "answer": 70,
    "category": "technology",
    "explanation": "The Unicode Consortium adds dozens of new emojis annually based on proposals and trends."
  },
  {
    "question": "How many tweets are sent on Twitter (X) every day?",
    "answer": 500000000,
    "category": "technology",
    "explanation": "Twitter has hundreds of millions of daily messages across its global user base."
  },
  {
    "question": "How many times can a piece of paper be recycled before fibers break down?",
    "answer": 7,
    "category": "environment",
    "explanation": "Paper fibers shorten and weaken with each cycle, typically limiting them to around seven uses."
  },
  {
    "question": "How many kilometers of fiber optic cable have been laid globally?",
    "answer": 500000000,
    "category": "technology",
    "explanation": "Vast undersea and terrestrial networks deliver high-speed data via hundreds of millions of km of fiber."
  },
  {
    "question": "How many vertebrae does a snake have?",
    "answer": 400,
    "category": "biology",
    "explanation": "Snakes can have hundreds of vertebrae along a flexible spine, varying by species."
  },
  {
    "question": "How many cells are in a chicken egg?",
    "answer": 1,
    "category": "biology",
    "explanation": "An unfertilized chicken egg is essentially a single large cell until embryonic development begins."
  },
  {
    "question": "How many man-made objects over 10 cm are orbiting Earth?",
    "answer": 34000,
    "category": "space",
    "explanation": "Space agencies track tens of thousands of sizable debris pieces to prevent collisions."
  },
  {
    "question": "How many neurons does a starfish have?",
    "answer": 18000,
    "category": "biology",
    "explanation": "A starfish has a decentralized nervous system with thousands of neurons in its nerve net."
  },
  {
    "question": "How many nerve cells are in the human spinal cord?",
    "answer": 100000000,
    "category": "biology",
    "explanation": "The spinal cord hosts millions to hundreds of millions of neurons conducting signals."
  },
  {
    "question": "How many new companies register on the stock market each year globally?",
    "answer": 3000,
    "category": "business",
    "explanation": "IPOs and new listings worldwide add up to a few thousand annually, though it fluctuates year to year."
  },
  {
    "question": "How many years old is the oldest known living tree?",
    "answer": 4850,
    "category": "environment",
    "explanation": "A bristlecone pine named Methuselah in California is close to five millennia in age."
  },
  {
    "question": "How many atoms thick is a sheet of aluminum foil?",
    "answer": 200000,
    "category": "chemistry",
    "explanation": "Household foil is a few thousandths of a millimeter thick, equating to hundreds of thousands of atoms."
  },
  {
    "question": "How many postcards are mailed worldwide each year?",
    "answer": 3000000000,
    "category": "communication",
    "explanation": "Though less common in the digital age, billions of postcards are still sent annually, often by tourists."
  },
  {
    "question": "How many gallons of water does the average ocean liner swimming pool hold?",
    "answer": 300000,
    "category": "estimation",
    "explanation": "Large cruise ships feature big pools, each holding hundreds of thousands of gallons of water."
  },
  {
    "question": "How many wind turbines are installed worldwide?",
    "answer": 340000,
    "category": "energy",
    "explanation": "Wind energy has expanded with hundreds of thousands of turbines operating globally."
  },
  {
    "question": "How many known species of whales and dolphins (cetaceans) are there?",
    "answer": 90,
    "category": "biology",
    "explanation": "Cetacea includes whales, dolphins, and porpoises, collectively numbering around 90 species."
  },
  {
    "question": "How many countries participate in the Eurovision Song Contest?",
    "answer": 40,
    "category": "entertainment",
    "explanation": "Though begun among fewer nations, Eurovision now features around 40 participating countries."
  },
  {
    "question": "How many microprocessors are produced each year worldwide?",
    "answer": 15000000000,
    "category": "technology",
    "explanation": "From tiny embedded chips to CPUs, billions of microprocessors are fabricated annually."
  },
  {
    "question": "How many chemical compounds can be found in a cup of coffee?",
    "answer": 1000,
    "category": "chemistry",
    "explanation": "Coffee beans undergo complex roasting processes, producing a wide array of chemical compounds."
  },
  {
    "question": "How many garbage trucks operate daily in the U.S.?",
    "answer": 130000,
    "category": "transportation",
    "explanation": "Waste management fleets across municipalities deploy many thousands of trucks per day."
  },
  {
    "question": "How many eggs does a sea turtle lay in a single nesting season on average?",
    "answer": 100,
    "category": "biology",
    "explanation": "Females deposit clutches of around 50–200 eggs multiple times per season on nesting beaches."
  },
  {
    "question": "How many bright stars are in the Big Dipper asterism?",
    "answer": 7,
    "category": "astronomy",
    "explanation": "The Big Dipper is formed by seven prominent stars in the constellation Ursa Major."
  },
  {
    "question": "How many holes are played across all professional golf tournaments annually?",
    "answer": 10000000,
    "category": "sports",
    "explanation": "Thousands of tournaments, each with many rounds, collectively add up to millions of holes played."
  },
  {
    "question": "How many occurrences of the letter 'e' are there in the novel 'Les Misérables' (original French)?",
    "answer": 600000,
    "category": "literature",
    "explanation": "Letter-frequency analysis of Victor Hugo’s text reveals roughly 600,000 uses of 'e'."
  },
  {
    "question": "How many seeds can a typical tomato plant produce?",
    "answer": 15000,
    "category": "agriculture",
    "explanation": "A healthy tomato plant can yield numerous fruits, each containing dozens of seeds."
  },
  {
    "question": "How many living coral species are there worldwide?",
    "answer": 800,
    "category": "biology",
    "explanation": "Coral reefs include hundreds of hard and soft coral species across tropical oceans."
  },
  {
    "question": "How many new web domains are registered each day?",
    "answer": 80000,
    "category": "technology",
    "explanation": "Domain registrars report tens of thousands of daily registrations for new websites or services."
  },
  {
    "question": "How many nerve endings are in each fingertip?",
    "answer": 3000,
    "category": "biology",
    "explanation": "Fingertips are highly sensitive due to thousands of nerve endings for fine tactile perception."
  },
  {
    "question": "How many flowers must a bee visit to make a pound of honey?",
    "answer": 2000000,
    "category": "biology",
    "explanation": "Workers collect nectar from millions of blossoms to produce just one pound of honey."
  },
  {
    "question": "How many kilometers of the U.S. interstate highway system exist?",
    "answer": 77000,
    "category": "transportation",
    "explanation": "This highway network, planned in the 1950s, encompasses over 48,000 miles (77,000 km)."
  },
  {
    "question": "How many lines of symmetry does a snowflake typically have?",
    "answer": 6,
    "category": "environment",
    "explanation": "Snowflakes typically exhibit hexagonal symmetry, forming six identical arms."
  },
  {
    "question": "How many active forest fires occur in the world at any given time?",
    "answer": 10000,
    "category": "environment",
    "explanation": "Satellite data suggest thousands of wildfires burn simultaneously around the globe."
  },
  {
    "question": "How many requests does the largest websites handle each second?",
    "answer": 300000,
    "category": "technology",
    "explanation": "Massive sites like search engines or social media can process hundreds of thousands of hits per second."
  },
  {
    "question": "How many times does the average smartphone user check their phone per day?",
    "answer": 150,
    "category": "technology",
    "explanation": "User behavior studies show frequent phone checks, often exceeding a hundred times daily."
  },
  {
    "question": "How many pine cones does an average pine tree produce in a year?",
    "answer": 200,
    "category": "environment",
    "explanation": "Production varies with species and climate, but a few hundred cones per season is typical."
  },
  {
    "question": "How many teaspoons of sugar are in a 12-ounce can of soda?",
    "answer": 10,
    "category": "food",
    "explanation": "One can often has around 40 grams of sugar, roughly 10 teaspoons total."
  },
  {
    "question": "How many liters of water does a single cow drink per day?",
    "answer": 90,
    "category": "agriculture",
    "explanation": "A dairy cow can consume 90 liters or more daily depending on climate and milk production."
  },
  {
    "question": "How many times a year is the Statue of Liberty struck by lightning?",
    "answer": 600,
    "category": "weather",
    "explanation": "Being tall and exposed, the statue is hit hundreds of times annually, especially during storms."
  },
  {
    "question": "How many gas stations are there in the United States?",
    "answer": 150000,
    "category": "transportation",
    "explanation": "Business directories indicate hundreds of thousands of retail fueling locations nationwide."
  },
  {
    "question": "How many different species of ants exist in the Amazon rainforest?",
    "answer": 3000,
    "category": "biology",
    "explanation": "The Amazon harbors immense ant biodiversity, with thousands of described species."
  },
  {
    "question": "How many ounces of water does an adult human lose during a normal night’s sleep?",
    "answer": 16,
    "category": "health",
    "explanation": "Perspiration and respiration lead to around a pound (16 oz) of water lost overnight."
  },
  {
    "question": "How many stars are there in the Milky Way galaxy?",
    "answer": 200000000000,
    "category": "astronomy",
    "explanation": "Estimates range from 100 to 400 billion stars, with 200 billion used as a central figure."
  },
  {
    "question": "How many people have ever lived on Earth?",
    "answer": 117000000000,
    "category": "demographics",
    "explanation": "Demographers approximate total human life over millennia at around 117 billion."
  },
  {
    "question": "How many cells are in the human body?",
    "answer": 37200000000000,
    "category": "biology",
    "explanation": "Recent estimates range 30–40 trillion cells, though the exact number varies by individual."
  },
  {
    "question": "How many piano keys are there in a standard piano?",
    "answer": 88,
    "category": "music",
    "explanation": "Traditional piano design includes 52 white and 36 black keys, spanning a bit more than 7 octaves."
  },
  {
    "question": "How many teaspoons are in a gallon?",
    "answer": 768,
    "category": "measurement",
    "explanation": "One gallon equals 16 cups; each cup has 48 teaspoons, leading to 768 teaspoons per gallon."
  },
  {
    "question": "How many liters of blood are in the human body?",
    "answer": 5,
    "category": "biology",
    "explanation": "The average adult circulates around 4–6 liters of blood, depending on size and health."
  },
  {
    "question": "How many moons does Jupiter have?",
    "answer": 95,
    "category": "astronomy",
    "explanation": "Jupiter’s moon count has risen over time as more small satellites have been discovered."
  },
  {
    "question": "How many bones are in the adult human body?",
    "answer": 206,
    "category": "biology",
    "explanation": "Humans start with more bones that fuse during growth, resulting in 206 typical adult bones."
  },
  {
    "question": "How many words are in the average English dictionary?",
    "answer": 170000,
    "category": "language",
    "explanation": "Major dictionaries list over 100,000 headwords, not counting inflections and historical forms."
  },
  {
    "question": "How many people live in the most populous city in the world?",
    "answer": 37000000,
    "category": "demographics",
    "explanation": "Greater metropolitan areas like Tokyo can exceed 37 million residents."
  },
  {
    "question": "How many seconds are there in a year?",
    "answer": 31536000,
    "category": "time",
    "explanation": "A non-leap year has 365 days, each with 24 hours, 60 minutes, and 60 seconds."
  },
  {
    "question": "How many chessboard squares are there in an 8x8 board?",
    "answer": 64,
    "category": "games",
    "explanation": "An 8x8 grid yields 64 individual squares for standard chess play."
  },
  {
    "question": "How many grains of sand are estimated to be on Earth?",
    "answer": 7500000000000000000,
    "category": "geology",
    "explanation": "Rough geological estimates place Earth’s total sand grains in the quintillions."
  },
  {
    "question": "How many kilometers is the circumference of the Earth?",
    "answer": 40075,
    "category": "geography",
    "explanation": "At the equator, Earth’s circumference is approximately 40,075 km."
  },
  {
    "question": "How many languages are spoken in the world?",
    "answer": 7000,
    "category": "language",
    "explanation": "Linguistic cataloging identifies around 7,000 living languages globally, though definitions vary."
  },
  {
    "question": "How many digits of pi have been calculated?",
    "answer": 100000000000000,
    "category": "mathematics",
    "explanation": "Record computations of π exceed 100 trillion digits using advanced computing power."
  },
  {
    "question": "How many people have walked on the moon?",
    "answer": 12,
    "category": "astronomy",
    "explanation": "During the Apollo missions (1969–1972), twelve astronauts set foot on the lunar surface."
  },
  {
    "question": "How many Olympic medals has Michael Phelps won?",
    "answer": 28,
    "category": "sports",
    "explanation": "Phelps is the most decorated Olympian, with 28 total medals across multiple Games."
  },
  {
    "question": "How many miles are in a light-year?",
    "answer": 5878625370000,
    "category": "astronomy",
    "explanation": "One light-year is the distance light travels in one year, about 9.46 trillion kilometers (5.88T miles)."
  },
  {
    "question": "How many atoms are in a drop of water?",
    "answer": 1670000000000000000000,
    "category": "chemistry",
    "explanation": "Using Avogadro’s number and approximations, a small drop still has billions of trillions of atoms."
  },
  {
    "question": "How many heartbeats does the average human have in a lifetime?",
    "answer": 3000000000,
    "category": "biology",
    "explanation": "Assuming ~80 bpm over ~70 years, a human heart beats around 3 billion times."
  },
  {
    "question": "How many countries are there in the world?",
    "answer": 195,
    "category": "geography",
    "explanation": "This typically includes UN member states (193) plus observer states (2)."
  },
  {
    "question": "How many planets are in the Solar System?",
    "answer": 8,
    "category": "astronomy",
    "explanation": "After Pluto’s reclassification in 2006, we officially recognize eight planets."
  },
  {
    "question": "How many subway stations are in New York City?",
    "answer": 472,
    "category": "transportation",
    "explanation": "The MTA operates hundreds of subway stations, the largest system in the U.S."
  },
  {
    "question": "How many minutes does light take to travel from the Sun to Earth?",
    "answer": 8,
    "category": "astronomy",
    "explanation": "Light traveling at ~300,000 km/s covers ~150 million km in about 8 minutes, 20 seconds."
  },
  {
    "question": "How many soccer balls fit inside an Olympic swimming pool?",
    "answer": 500000,
    "category": "estimation",
    "explanation": "An Olympic pool’s volume approximates 2,500 m³, enough space for half a million standard soccer balls."
  },
  {
    "question": "How many paintings did Picasso create?",
    "answer": 13500,
    "category": "art",
    "explanation": "Picasso was famously prolific, producing thousands of paintings, plus drawings and sculptures."
  },
  {
    "question": "How many bacteria are in the human gut?",
    "answer": 39000000000000,
    "category": "biology",
    "explanation": "The gut microbiota can rival or exceed the total number of human cells in the body."
  },
  {
    "question": "How many liters of air does a person breathe per day?",
    "answer": 11000,
    "category": "biology",
    "explanation": "At about 7–8 liters per minute, daily inhalation totals over 10,000 liters of air."
  },
  {
    "question": "How many flights take off worldwide every day?",
    "answer": 100000,
    "category": "transportation",
    "explanation": "Commercial flight data suggests around 100,000 departures daily on average."
  },
  {
    "question": "How many miles of road are there in the United States?",
    "answer": 4100000,
    "category": "transportation",
    "explanation": "Federal and state highways plus local roads sum to over four million miles nationally."
  },
  {
    "question": "How many hours are there in a decade?",
    "answer": 876000,
    "category": "time",
    "explanation": "One decade is 10 years; 10 × 365 days/year × 24 hours/day = 87,600 hours (ignoring leap years)."
  },
  {
    "question": "How many cars are there in the world?",
    "answer": 1500000000,
    "category": "transportation",
    "explanation": "International registrations indicate over a billion vehicles on roads worldwide."
  },
  {
    "question": "How many satellites are orbiting Earth?",
    "answer": 9300,
    "category": "space",
    "explanation": "Thousands of active and inactive satellites span various orbits for communication, GPS, and research."
  },
  {
    "question": "How many tennis balls are used in Wimbledon each year?",
    "answer": 54250,
    "category": "sports",
    "explanation": "Wimbledon replaces balls frequently, leading to tens of thousands used each tournament."
  },
  {
    "question": "How many hamburgers does McDonald's sell each second?",
    "answer": 75,
    "category": "food",
    "explanation": "High global demand means the chain sells dozens of burgers every second."
  },
  {
    "question": "How many raindrops fall in a thunderstorm?",
    "answer": 1000000000000,
    "category": "weather",
    "explanation": "Thunderstorms can produce billions to trillions of droplets, depending on size and duration."
  },
  {
    "question": "How many licks does it take to reach the center of a Tootsie Pop?",
    "answer": 500,
    "category": "food",
    "explanation": "A classic tongue-in-cheek question; informal experiments suggest a few hundred licks."
  },
  {
    "question": "How many smartphones are in use worldwide?",
    "answer": 6600000000,
    "category": "technology",
    "explanation": "Mobile analytics show billions of active smartphones, nearing global saturation."
  },
  {
    "question": "How many kilometers does a car travel in its lifetime?",
    "answer": 300000,
    "category": "transportation",
    "explanation": "Car odometers often reach 200,000+ miles (≈300,000 km) before major issues or retirement."
  },
  {
    "question": "How many people can fit inside the Colosseum?",
    "answer": 50000,
    "category": "history",
    "explanation": "In ancient times, Rome’s Colosseum was estimated to seat around 50,000 spectators."
  },
  {
    "question": "How many insects are there per human on Earth?",
    "answer": 200000000,
    "category": "biology",
    "explanation": "Entomologists estimate hundreds of millions of insects for each of the ~8 billion humans."
  },
  {
    "question": "How many neurons are in the human brain?",
    "answer": 86000000000,
    "category": "biology",
    "explanation": "Neuroscientists approximate around 86 billion neurons, plus trillions of supporting glia."
  },
  {
    "question": "How many people visit the Great Wall of China each year?",
    "answer": 10000000,
    "category": "tourism",
    "explanation": "One of the most famous landmarks, it attracts millions of visitors from across the globe."
  },
  {
    "question": "How many slices of pizza does the average American eat per year?",
    "answer": 46,
    "category": "food",
    "explanation": "Pizza remains extremely popular, with many Americans consuming multiple slices weekly."
  },
  {
    "question": "How many words does the average novel contain?",
    "answer": 90000,
    "category": "literature",
    "explanation": "Typical adult fiction novels range from ~60k to 100k words, with 90k as a common midpoint."
  },
  {
    "question": "How many trees are cut down each year for paper production?",
    "answer": 15000000000,
    "category": "environment",
    "explanation": "Demand for paper-based products leads to billions of trees felled annually, though recycling helps."
  },
  {
    "question": "How many people does the London Underground transport daily?",
    "answer": 5000000,
    "category": "transportation",
    "explanation": "A major transit system in a global metropolis, the Tube sees millions of passengers daily."
  },
  {
    "question": "How many times does a hummingbird flap its wings per second?",
    "answer": 50,
    "category": "biology",
    "explanation": "Small hummingbird species can flap anywhere from 50 to 80 times per second during hovering."
  },
  {
    "question": "How many microplastics are consumed by humans per year?",
    "answer": 74000,
    "category": "health",
    "explanation": "Water, food, and air expose humans to tens of thousands of tiny plastic particles annually."
  },
  {
    "question": "How many meteors enter Earth’s atmosphere daily?",
    "answer": 17000000,
    "category": "space",
    "explanation": "Minuscule space debris and dust particles bombard Earth constantly, mostly burning up on entry."
  },
  {
    "question": "How many Olympic gold medals has Usain Bolt won?",
    "answer": 8,
    "category": "sports",
    "explanation": "Bolt captured 8 gold medals across three consecutive Olympic Games in sprint events."
  },
  {
    "question": "How many paperclips can be made from the Eiffel Tower?",
    "answer": 3000000000,
    "category": "estimation",
    "explanation": "Assuming the tower’s mass in steel and standard paperclip weight, billions could be formed."
  }
]