Categories
Everything in the library
A peek behind the curtain. Every fact in Fact Machine, grouped by where it came from.
🌌Space
Cosmic scales, strange planets, impossible stars.
- A day on Venus is longer than its year — it takes 243 Earth days to rotate once.
- Neutron stars can spin 600 times per second.
- A teaspoon of neutron star material would weigh about 6 billion tons.
- There are more stars in the universe than grains of sand on every beach on Earth.
- Saturn is so low-density it would float in a (very large) bathtub.
🌿Nature
Animals, plants, and the planet's quiet weirdness.
- There are more trees on Earth than stars in the Milky Way.
- Octopuses have three hearts and blue blood.
- Sharks existed before trees did.
- Sloths can hold their breath underwater for up to 40 minutes.
- A group of flamingos is called a 'flamboyance'.
🏛️History
Moments and people that shaped the world.
- Honey never spoils — edible jars have been found in 3,000-year-old tombs.
- Cleopatra lived closer in time to the Moon landing than to the building of the Great Pyramid.
- Oxford University is older than the Aztec Empire.
- The Eiffel Tower was meant to be a temporary structure for the 1889 World's Fair.
🧬Human Body
The machine you're reading this with.
- Your stomach gets an entirely new lining every 3 to 5 days.
- The human eye can distinguish about 10 million colors.
- Bones are about 5 times stronger than steel of the same density.
- You're slightly taller in the morning than at night.
✨Oddities
Facts that simply refuse to make sense.
- Bananas are berries, but strawberries are not.
- A bolt of lightning is five times hotter than the surface of the Sun.
- The Eiffel Tower can grow more than 6 inches taller in summer.
- Wombat poop is cube-shaped.