Science & curiosity quizzes
Level up your curiosity. Answer to earn XP, build streaks, and unlock harder challenges.
Quick Challenges
218 quizzesCan a mantis shrimp punch faster than a bullet?
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Which planet rains diamonds?
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What would happen to your body if you fell into a stellar-mass black hole?
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Where is the majority of an octopus's neurons located?
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What kind of 'snow' falls on the highest peaks of the planet Venus?
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How many bacterial cells live in and on the average human body?
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Which common fruit is naturally radioactive enough to trigger sensors at ports?
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How do trees in a forest communicate and share nutrients with one another?
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What is unique about the digestive system of the platypus?
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What is the phenomenon where hot water freezes faster than cold water?
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Where is the heart of a shrimp located?
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Ounce for ounce, which of these is stronger than steel?
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How old is the Greenland shark estimated to live?
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Where is the driest place on Earth located?
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Which dinosaur lived closer in time to the Tyrannosaurus Rex than the Stegosaurus did?
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Why does your brain fill in the 'blind spot' in your vision?
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What allows a tardigrade to survive the vacuum of space?
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According to relativity, where does time pass slightly faster?
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Why can honey found in 3,000-year-old Egyptian tombs still be eaten?
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What is the suspected composition of rain on Saturn and Jupiter?
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Which creature is considered biologically immortal because it can restart its life cycle?
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What is unique about the 15th-century Voynich Manuscript?
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Where does more than half of the Earth's oxygen supply come from?
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How often does your body replace your stomach lining?
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What is currently happening to the distance between the Moon and Earth?
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What is true about the size of a blue whale's heart?
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What happens when two quantum-entangled particles are separated by light years?
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Which animal survives winter by allowing its own blood and organs to freeze solid?
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Which moon in our solar system is the most geologically active with hundreds of erupting volcanoes?
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What happens to the internal body of a caterpillar during its transformation inside a chrysalis?
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How long do most white blood cells live inside the human body?
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Which deep-sea creature possesses eyes the size of a standard soccer ball?
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Approximately how much does an average white cumulus cloud weigh?
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Which slow-moving sea creature produces a venom so complex it acts as a powerful painkiller?
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How long can it take for a three-toed sloth to digest a single meal?
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What unexpected material was discovered at the very summit of Mount Everest?
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Which planet in our solar system is the hottest, despite not being closest to the sun?
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What is the primary food source for microscopic dust mites living in carpets and bedding?
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What gas makes up a giant interstellar cloud located near the center of our galaxy?
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Which part of the human body lacks blood vessels and gets its oxygen directly from the air?
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What is the maximum recorded speed of a Peregrine Falcon during a hunting dive?
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What would happen to a standard basketball at the bottom of the Mariana Trench?
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Which phenomenon causes people to see patterns of falling blocks after playing a game for hours?
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If you could extract all the gold from Earth's core, how much would you have?
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How much would a single teaspoon of material from a neutron star weigh?
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Which Australian plant produces a sting so painful it can last for months or even years?
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What is 'Pando', a massive organism found in Utah that is actually a single living thing?
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On average, how many inches of snow equal the water content of one inch of rain?
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How does the size of an ostrich's eye compare to the size of its brain?
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What happens to the gas helium when it is cooled to near absolute zero?
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What is the purpose of the coccyx, or tailbone, in the modern human body?
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Why is it impossible for a human to sink while swimming in the Dead Sea?
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Which animal has fingerprints so similar to humans they can confuse crime scene investigators?
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Approximately how much gold is dissolved within the world's combined ocean waters?
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Which animal can safely digest anthrax and cholera thanks to its extreme stomach acidity?
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Why does the Eiffel Tower grow up to six inches taller during the summer?
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Which planet takes longer to complete one rotation than it does to orbit the Sun?
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What common metal object can human stomach acid dissolve within a few hours?
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What causes the heavy 'Sailing Stones' of Death Valley to move across the desert floor?
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What is considered the largest living organism by area on Earth?
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What happens to your hearing when your eyes see a different mouth shape than the sound?
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Where do microscopic eight-legged mites live and breed on almost every adult human?
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Where does time technically pass slightly faster due to the effects of gravity?
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How do woodpeckers protect their brains from the high-impact force of drumming on trees?
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Which sea creature does not weaken or lose fertility as it ages?
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Which spider's bite can cause a painful, hours-long erection in human males?
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Which celestial body has a surface area smaller than the country of Russia?
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What would the upper atmosphere of Uranus smell like to a human observer?
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Which part of the human body has no blood vessels and gets oxygen directly from air?
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What is the rare, 600-mile long tube-shaped cloud formation found in Northern Australia?
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Why do bacteria have a difficult time growing on the surface of shark skin?
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At what specific condition can water be a gas, liquid, and solid simultaneously?
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Which animal is the only species known to produce cube-shaped droppings?
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What color is the blood of a horseshoe crab due to its copper content?
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What color is the skin of a polar bear underneath its white fur?
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What would happen if you placed the planet Saturn in a massive cosmic bathtub?
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Which type of sound frequency is more effective than white noise for deep sleep?
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Why can some tap water in certain geographical areas be set on fire?
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What is the true color of the Sun when viewed from space?
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How do dolphins prevent drowning while they are sleeping?
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Why didn't trees rot for millions of years during the Carboniferous period?
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What happens to light when it passes very close to a massive galaxy?
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Which human sense is most directly linked to the brain's emotion and memory centers?
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How does the common woodlouse breathe while living on dry land?
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How many eyes does a box jellyfish use to navigate the ocean?
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Why are banana peels physically much more slippery than most other fruit skins?
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What allows a water bear to survive being completely dried out?
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How does the common cuckoo trick other birds into raising its young?
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Which insect is ranked as having the most painful sting in the world?
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Why is it harder to breathe at the top of a high mountain?
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What is the approximate total length of all blood vessels in one adult human?
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At what speed does darkness move when a light source is removed?
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Why can't sound waves travel through the vacuum of outer space?
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How do saltwater crocodiles survive drinking seawater without getting dehydrated?
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How hot is a typical bolt of lightning compared to the Sun?
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What percentage of the body's total energy is consumed by the human brain?
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Where does a pufferfish get its deadly tetrodotoxin poison from?
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How hot is the bubble created by a snapping shrimp's claw?
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What makes Moon dust particularly dangerous to astronauts and equipment?
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What prevents your stomach from digesting itself while breaking down food?
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Which part of its body does a butterfly use to taste flowers?
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Why is mercury the only metal that remains a liquid at room temperature?
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What distinct odor does the urine of a maned wolf resemble to humans?
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At what age does a Greenland shark typically reach reproductive maturity?
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Which animal creates complex geometric circles on the seafloor to attract a mate?
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How much slime can a single hagfish produce in a matter of seconds?
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Which material found in limpet snail teeth is the strongest biological substance known?
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What makes the hooded pitohui bird of New Guinea uniquely dangerous to touch?
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How long can a naked mole rat survive in a zero-oxygen environment?
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How does the hawk moth caterpillar defend itself against hungry birds?
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What does a sea cucumber eject from its body to distract predators?
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How many different color-receptive cones do mantis shrimp have in their eyes?
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If you stood on the surface of Venus, where would you see the sun rise?
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How often does your body completely replace your entire outer layer of skin?
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What caused the majority of the different mineral types found on Earth today?
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What is the primary scientific explanation for the mysterious dancing 'Marfa Lights' in Texas?
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Which sense allows you to touch your nose accurately even with your eyes closed?
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Where did the mitochondria inside your cells originally come from billions of years ago?
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How many times can a fast-spinning neutron star rotate in a single second?
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Which precious metal is naturally found dissolved within the human bloodstream?
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Where did prehistoric Megalodons leave their young to protect them from larger predators?
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What unusual geometric shape is the permanent storm at Saturn's north pole?
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What is the primary power source for deep-sea shipwreck-eating bacteria?
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What happens if you stroke a fake rubber hand and your hidden real hand simultaneously?
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How much of the world's digital data could fit inside one gram of DNA?
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What happens to the speed of light when it enters a diamond?
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If you were in a total vacuum without a suit, what happens to your blood?
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Which of these is a real underwater continent mostly submerged in the Pacific?
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What happens when you stare fixedly at a blurry image for thirty seconds?
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If you gathered every virus on Earth together, how much would they weigh?
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What is a major component of white sand on tropical beaches?
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What does a significant portion of indoor household dust actually consist of?
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Which common substance caused the 1986 disaster at Lake Nyos that suffocated thousands of people?
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The pain from a Gympie-Gympie tree sting is caused by needles made of what material?
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How does the Moon's gradual movement away from Earth affect the length of our day?
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Where is the coldest known environment in the entire universe currently located?
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What allowed Meganeura, a prehistoric ancestor of the dragonfly, to grow the size of a pigeon?
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What geologic evidence explains why a massive waterfall once existed at the Strait of Gibraltar?
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The immortal jellyfish achieves its biological immortality through which cellular process?
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Where do male platypuses house the venomous spurs they use during mating season?
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What is the primary cause of oxygen-depleted 'dead zones' in the world's oceans?
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Why have surgeons occasionally used shark eyes to treat human patients?
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What happens to a caterpillar's learned memories after it liquefies inside a cocoon?
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What triggered hundreds of people to dance uncontrollably until they collapsed in 1518?
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If you stare at a circle of flashing purple dots, what color appears?
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Which microscopic organisms live inside glass houses and produce 20% of Earth's oxygen?
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What determines the shape of the cone trailing behind a supersonic jet?
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What is the true nature of the 100-acre forest known as Pando?
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What prevents anyone from reaching the bottom of the Oak Island Money Pit?
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What happens to your ability to see color at the far edges of your vision?
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How do doctors typically cure a life-threatening C. diff bacterial infection today?
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What strange behavior does liquid helium exhibit when cooled near absolute zero?
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How long can a single dead whale support a miniature ecosystem on the seafloor?
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How does the geographic cone snail immobilize schools of fish instantly?
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What is the primary component of the giant interstellar cloud Sagittarius B2?
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What happens to the tail that every human embryo develops during early growth?
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Why are 'underwater lakes' on the ocean floor deadly to most marine life?
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How does lightning on Jupiter differ from lightning found on Earth?
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How much of the human skeleton is completely replaced every year?
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What color was the surface of the Earth likely to be billions of years ago?
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How many separate hearts does a box jellyfish use to pump its fluid?
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What unusual material does the newly discovered Lithoredo abatanica shipworm eat?
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What happens to a clownfish colony if the dominant female dies?
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Which animal is the only living relative of the long-necked giraffe?
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What geological phenomenon occurs within the Earth's liquid outer core?
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What produced the 'Bloop,' the loudest underwater sound ever recorded in 1997?
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How did ancient Roman concrete structures survive for 2,000 years in seawater?
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Why do you see a green shape after staring at a red square?
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Why do most metals appear shiny and silver to the human eye?
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What microscopic structure pulls chromosomes apart during human cell division?
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What did residents of Nuremberg report seeing in the sky in 1561?
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What was the climate of the interior of the supercontinent Pangea?
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Which animal can survive a direct sting to its brain from a high-voltage hunter wasp?
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What common garden plant produces a toxin twice as deadly as king cobra venom?
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What caused the largest mass extinction event in Earth's history by producing too much oxygen?
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What high-energy phenomenon occurs inside thunderstorms that is usually associated with nuclear explosions?
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What substance forms a cloud over 400 billion kilometers wide near the center of our galaxy?
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What do astronauts frequently report as the distinct smell of outer space?
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What happens to the tail every human embryo develops during the first weeks of growth?
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How much of a human liver can be removed while still allowing it to grow back?
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Which group of people is famously resistant to the hollow-face optical illusion?
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Looking closely at a strawberry, what are the tiny yellow 'seeds' on the outside actually?
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What physical force allows light to physically push objects in a vacuum?
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How do cuttlefish detect prey that is effectively transparent to the human eye?
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How do eyeless shrimp living near pitch-black hydrothermal vents detect heat?
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The Mamlambo is a river monster legend often explained by which real animal?
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Why does a water droplet skitter across a very hot pan without evaporating?
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Even with zebra-like leg stripes, which animal is the okapi’s only living relative?
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Which sea is the only one on Earth that has no land boundaries?
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What is the primary characteristic of the mysterious Taos Hum reported in New Mexico?
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How do short-lived muons from space reach the ground before they decay?
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What was the tallest living structure on land 400 million years ago?
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Which specific population is most likely to possess a fourth type of color-detecting cone cell?
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What did researchers find living inside 60 human belly buttons during a 2012 census?
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Why does the giant pitcher plant occasionally thrive in nitrogen-poor, toxic swamp environments?
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What happened to the Earth's oceans when microbes first began producing massive amounts of oxygen?
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What happens to your ability to perceive specific colors at the very edges of your vision?
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What surrounds every human body, acting as a unique biological signature similar to a fingerprint?
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How does the geographic cone snail immobilize schools of fish before consuming them?
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Which common element makes the average human body slightly radioactive?
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What is the only thing the Voyager spacecraft cannot experience in the vacuum of interstellar space?
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How does a giraffe avoid a brain hemorrhage when it lowers its head to drink?
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Which organisms grew into twenty-foot pillars before trees dominated the landscape?
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What surprising material covers the entire outer surface of a shark?
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How much gold is estimated to be dissolved in Earth's ocean water?
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Which planet in our solar system features a long, comet-like tail?
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At what stage of development do all humans temporarily possess a physical tail?
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What was the source of the mysterious 'Bloop' sound recorded in the Pacific?
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What happens to stationary objects in your vision if you stare at a moving pattern?
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What microscopic object often sits at the center of a falling snowflake?
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How do physicists categorize the molecular structure of most common glass?
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How did the Earth's first massive oxygen supply change the ocean floor?
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Which unusual biological method does the shoebill stork use to regulate its body temperature?
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How do sardines effectively communicate to form massive, coordinated shoals during a predator attack?
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Why is it dangerous to stand under a manchineel tree during a rainstorm?
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Why does a female wombat have a pouch that opens backward toward its rear?
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What is the primary biological purpose of the spiral tusk found on a narwhal?
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What happens to the fur of a platypus when it is exposed to ultraviolet light?
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