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11,491 facts. Click any fact to see its full page.
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π History 1,991
π¬ Science 1,964
πΎ Animals 1,525
π Space 977
π§ Psychology 893
πΏ Nature 759
π» Technology 735
π Geography 599
π Culture 581
π« Human Body 572
π Ocean 373
π¬ Language 245
π Food 199
β¨ General 68
β¨ Dinosaur 10
Crows in Japan drop nuts on crosswalks and wait for cars to crack them, then collect them at the red light.
The ocean emits about 25% of the sound heard by underwater creatures.
Cockroaches existed 300 million years ago and predate even dinosaurs.
The praying mantis is the only insect known to have a single ear, located on the underside of its belly.
Slugs have four noses β two pairs of tentacles, one pair for light detection and one for smell.
The human nose can detect some smells in concentrations as low as a few parts per trillion.
A shrimp's heart is located in its head.
The average person's heart will beat about 2.5 billion times during their lifetime.
Wombats are the only animals known to produce cubic feces β up to 80β100 cubes per night.
A day on Venus is longer than a year on Venus.
The longest hiccup attack on record lasted 68 years, suffered by Charles Osborne of Iowa.
Penguins propose to their mates by presenting a carefully chosen pebble β and rejection is common.
The phrase 'rule of thumb' has multiple possible origins β none involving domestic violence, despite popular myth.
More than 80% of all species on Earth remain undiscovered by science.
The Eiffel Tower can grow taller by 6 inches in summer due to heat expanding the metal.
Glass takes 1 million years to fully decompose in a landfill.
There are more possible genetic combinations in a single human than atoms in the observable universe.
The mantis shrimp can deliver a punch with the acceleration of a .22 caliber bullet.
Ancient Egyptians had 45 different words for quality of meat.
Almonds are the most popular nut in the world by consumption.
The average cumulus cloud weighs 1.1 million pounds β equivalent to 100 elephants.
A grizzly bear's sense of smell is 7 times stronger than a bloodhound and 2,100 times stronger than a human.
The footprints left on the Moon will remain intact for at least 10 million years.
The human stomach produces a new lining every 3β5 days to prevent digesting itself.
Raindrops are not teardrop-shaped β they are spherical when small and look like hamburger buns when large.
There are more possible iterations of a Rubik's Cube than there are atoms on Earth.
The Great Wall of China was never effective at keeping invaders out β gates were often simply bribed or abandoned.
Your body makes a new skeleton approximately every 10 years through continuous bone remodeling.
A day on the Moon lasts about 29.5 Earth days β the same as one lunar month.
Bananas are slightly radioactive due to their potassium-40 content.
The platypus sweats milk β it has no nipples, so nutrients seep through patches of skin to nursing young.
Tigers have striped skin, not just striped fur β the pattern is unique to each individual.
The largest snowflake ever recorded was 15 inches wide and 8 inches thick, reported in Montana in 1887.
There are more trees on Earth than stars in the Milky Way β an estimated 3 trillion trees.
The inventor of the Rubik's Cube, ErnΕ Rubik, took a month to solve his own puzzle after inventing it.
Albert Einstein's brain was removed without permission after his death and kept in a jar for 23 years.
Dogs have been shown to align their bodies along Earth's magnetic field when they urinate.
The Pacific Ocean covers more area than all of Earth's landmasses combined.
The world's strongest natural material is limpet teeth β stronger than spider silk and most engineered materials.
Giraffes have the same number of neck vertebrae as humans β just 7, but each one is very large.
Clouds with a high water content can weigh as much as 500 elephants.
The Earth's core is about the same temperature as the surface of the Sun β approximately 5,500Β°C.
It takes a photon about 100,000 years to travel from the Sun's core to its surface, but only 8 minutes to reach Earth.
The fingerprints of identical twins are different β they're shaped by random events in the womb.
More people have been to the Moon than have ever been to the Mariana Trench.
A 'jiffy' is a real unit of time β 1/100th of a second in electronics, or 3Γ10β»Β²β΄ seconds in physics.
The longest railroad in the world, the Trans-Siberian Railway, crosses 8 time zones.
Fireflies are found on every continent except Antarctica.
The world's most venomous animal by toxicity is the box jellyfish β it can kill a human in minutes.
A human produces enough saliva in a lifetime to fill two standard swimming pools.