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11,491 facts. Click any fact to see its full page.
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📜 History 1,991
🔬 Science 1,964
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🚀 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
Your stomach gets a new lining every three to four days because the acid would otherwise digest itself.
The total weight of all ants on Earth is roughly equal to the total weight of all humans.
Humans are bioluminescent — we emit light, but it's 1,000 times too weak for the human eye to detect.
If the Sun were a hollow sphere, about 1.3 million Earths could fit inside it.
Time passes slightly faster at your head than at your feet, due to gravitational time dilation.
An ant can carry up to 50 times its own body weight.
The smell of rain has a name — petrichor — and it's caused by bacteria, oils, and ozone.
There are more trees on Earth than stars in the Milky Way — about 3 trillion trees.
There have been five mass extinction events in Earth's history — and we may be in the sixth.
If Earth's history were compressed into a calendar year, humans appear at 11:36 PM on December 31st.
The current human population could fit inside a cube 1 mile on each side.
A day on Earth is gradually getting longer — tidal friction from the Moon slows Earth's rotation by 1.4 milliseconds per century.
The Eiffel Tower grows about 6 inches taller in summer due to thermal expansion of metal.
You are always looking into the past — even the light from your hand takes nanoseconds to reach your eyes.
There are more synaptic connections in a single human brain than stars in the Milky Way.
Cleopatra lived closer in time to the first Moon landing than to the construction of the Great Pyramid.
The last woolly mammoth died around 1650 BCE — about 900 years after Stonehenge was completed.
Mammoths were still alive when the Great Pyramid was being built.
Oxford University is older than the Aztec civilization.
The fax machine was invented before the telephone.
There are more possible iterations of a game of chess than there are atoms in the known universe.
The famous 'Wilhelm Scream' sound effect has been used in hundreds of movies since 1951.
Elvis Presley never wrote any of his own songs.
The Sistine Chapel ceiling took Michelangelo about 4 years to paint — largely on scaffolding, not lying down.
The color blue was extremely rare and expensive in medieval art, made from lapis lazuli imported from Afghanistan.
The 'Happy Birthday' song was under copyright until 2016.
Mozart could write music before he could write words — he composed his first piece at age 5.
Van Gogh only sold one painting in his lifetime.
The Eiffel Tower was supposed to be demolished 20 years after its construction in 1889.
The Mona Lisa has no eyebrows — it was fashionable to shave them in 15th-century Florence.
Beethoven continued composing after going completely deaf, writing his Ninth Symphony while totally deaf.
The number 0.999... (repeating) is mathematically equal to 1.
In any group of 23 people, there is a 50% chance that two share the same birthday.
The Fibonacci sequence appears throughout nature — in pinecones, sunflowers, and spiral galaxies.
A prime number is only divisible by 1 and itself — and there are infinitely many of them.
111,111,111 × 111,111,111 = 12,345,678,987,654,321.
The sum of all numbers from 1 to 100 is 5,050 — a formula discovered by Gauss as a child.
There are more ways to arrange a deck of 52 cards than there are atoms on Earth.
A googol is 1 followed by 100 zeros — a googolplex is 1 followed by a googol of zeros.
The number Pi has been calculated to over 100 trillion decimal places.
If you shuffle a deck of cards properly, the order is almost certainly unique in all of human history.
Zero is the only number that cannot be represented in Roman numerals.
The first novel ever written is widely considered to be 'The Tale of Genji', written by a Japanese woman around 1000 CE.
In Thailand, it's illegal to step on currency because the king's face is on it.
The word 'silly' originally meant 'blessed' in Old English.
Approximately 80% of information stored on computers is in English.
The exclamation point was originally called the 'note of admiration'.
The dot over the letters i and j has a name — it's called a tittle.
There's a German word 'schadenfreude' meaning pleasure derived from others' misfortune, with no English equivalent.
A 'fortnight' is two weeks — from 'fourteen nights'.