Facts About Everything.

The civilization that built the pyramids ran for longer than most empires existed at all — and most of what they did, we still can't fully explain.

Democracy, philosophy, geometry, drama, the Olympic Games — the Greeks didn't invent everything, but they invented the framework for examining it.

Atoms are 99.9999999% empty space. Solid matter is mostly nothing — held together by forces, not stuff.

Bacteria have been on Earth for 3.5 billion years. Humans have been here for about 300,000. The math is not in our favor.

Modern birds are technically theropod dinosaurs that survived the asteroid. They've been refining the flight strategy for 150 million years.

Your brain runs the show using less power than a refrigerator bulb — and most of what it does, it never tells you about.

Domestic cats are genetically almost indistinguishable from their wild ancestors — and that's not flattering for either of you.

Fish were the first animals with backbones, and they've been refining the formula for over 500 million years.

Galaxies are gravitationally bound systems of stars, gas, and dark matter. The smallest contain a few thousand stars. The largest contain a hundred trillion.

Insects outnumber humans by roughly 200 million to one. By biomass and species count, they're the dominant animal group on Earth.

Lightning is hotter than the surface of the Sun, strikes Earth millions of times a day, and we still can't fully explain why thunderstorms become electrically charged.

Without the Moon, Earth's axis would wobble unpredictably — and seasons, weather, and life as we know it might never have stabilized.

Three hearts, blue blood, distributed brains, and the ability to taste with their skin — octopuses are arguably the closest thing to alien life we'll ever meet.

The math works perfectly. The interpretation has never been settled. Quantum mechanics is the most accurate theory in physics and nobody fully agrees on what it means.

At its peak, Rome controlled territory from Britain to Mesopotamia, ran on engineering and bureaucracy, and lasted longer than the United States has existed by a factor of two.

Every atom in your body that's heavier than helium was forged inside a star — and most of those stars are long dead.

The Sun makes up 99.86% of the mass of the solar system — everything else, including Earth, is rounding error.

The observable universe is 93 billion light-years across and expanding. Most of what's in it is invisible, and most of what's visible is dying.

Water expands when it freezes, dissolves more substances than any other liquid, and the same molecules have been recycling through Earth for 4 billion years.