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11,491 facts. Click any fact to see its full page.
All 11,491
📜 History 1,991
🔬 Science 1,964
🐾 Animals 1,525
🚀 Space 977
🧠 Psychology 893
🌿 Nature 759
💻 Technology 735
🌍 Geography 599
🎭 Culture 581
🫀 Human Body 572
🌊 Ocean 373
💬 Language 245
🍕 Food 199
✨ General 68
✨ Dinosaur 10
Ancient Egyptians shaved off their eyebrows to mourn the death of a cat.
The Voyager probes carry golden records with sounds and images of Earth — a message to any civilization that might find them.
Titan has lakes and rivers, but they're filled with liquid methane instead of water.
The Olympus Mons volcano on Mars is so wide that if you stood on its edge, the other side would be beyond the horizon.
There are more galaxies in the observable universe than grains of sand on all of Earth's beaches.
Neptune was the first planet to be predicted mathematically before it was observed — astronomers noticed Uranus wasn't following expected orbit.
Light pollution is so pervasive that one third of humanity can no longer see the Milky Way.
Titan, Saturn's largest moon, is the only moon in the solar system with a dense atmosphere.
The temperature on the Moon swings from 260°F in sunlight to -280°F in shadow.
A pulsar — a rotating neutron star — can spin up to 700 times per second.
The center of the Milky Way smells like rum and tastes like raspberries — ethyl formate, the compound responsible, has been detected there.
Pluto is smaller than the United States — it's about 1,400 miles wide.
The International Space Station travels at 17,500 mph and orbits Earth every 90 minutes.
The observable universe is about 93 billion light-years in diameter.
Uranus rotates on its side — its axial tilt is 98 degrees, likely from a massive ancient collision.
The Sun loses about 4 million tons of mass every second through nuclear fusion.
A year on Pluto lasts 248 Earth years — it hasn't completed one orbit since its discovery in 1930.
There is a diamond planet twice the size of Earth — 55 Cancri e has a surface of graphite and diamond.
The largest known star, UY Scuti, is so large that if it replaced the Sun, it would extend past Jupiter.
Venus spins in the opposite direction to most planets — the sun rises in the west and sets in the east.
Sharks must keep moving to breathe — if they stop swimming, they suffocate.
Some species of jellyfish are 95% water.
The praying mantis is the only insect that can turn its head 180 degrees.
Cats can make over 100 distinct vocalizations — dogs can make about 10.
A group of crows is called a murder, a group of ravens is called an unkindness.
Frogs don't drink water — they absorb it through their skin.
Elephants are one of the few animals that recognize themselves in a mirror.
The Atlas moth has no mouth — it lives entirely off fat reserves stored during its caterpillar stage, surviving only about a week as an adult.
Ravens are among the most intelligent animals — they can plan for the future, deceive others, and solve multi-step puzzles.
A newborn blue whale gains about 200 pounds per day in its first year.
Flamingos are naturally white — their pink color comes entirely from the pigments in the algae and shrimp they eat.
The bombardier beetle shoots boiling hot toxic chemicals from its abdomen at predators.
Snakes can't blink — they have no eyelids, just a transparent scale covering each eye.
Electric eels can generate up to 600 volts of electricity.
Horses and cows sleep standing up but can only dream lying down.
A group of jellyfish is called a smack.
Koalas have fingerprints nearly identical to humans — so similar they have occasionally confused crime scene investigators.
A group of pandas is called an embarrassment.
Crocodiles have been virtually unchanged for 200 million years — they survived the mass extinction that killed the dinosaurs.
Penguins propose to their mates with pebbles — finding the perfect rock is a serious courtship ritual.
Dogs have a sense of smell that is 10,000 to 100,000 times more sensitive than humans.
A flock of starlings moving in unison is called a murmuration.
Elephants can hear through their feet — they detect low-frequency vibrations through the ground.
Polar bears have black skin beneath their white fur — the fur is actually transparent and reflects light.
A cat has 32 muscles in each ear and can rotate them 180 degrees.
Hummingbirds are the only birds that can fly backwards.
Sloths move so slowly that algae grows on their fur, providing camouflage.
The average person breathes about 22,000 times per day.
Your eyes are the same size from birth — only your nose and ears keep growing throughout life.
The human body produces enough electricity to power a small light bulb.