Explained Like You Are 5

Baseball starts on a green field, shaped just like a giant pizza […]

Long before cars or computers, people looked up. They saw a red

Maya astronomers track stars for centuries. They build a giant clock of

The internet was full of noise. Then one image changed everything. On

Long ago, weather was a terrifying mystery. A sudden storm could destroy

Long ago, the ground suddenly shook. Early humans fell down in fear.

Long ago, humans lived by the sun. Night meant danger. Day meant

News used to take months to travel. People felt very far apart

Long ago, people did not know the world. They only knew their

Physics felt complete in the late nineteenth century. Scientists thought they understood

1. A metal ball changed the world in 1957. The Soviet Union

Imagine playing a video game and walking right through a solid wall.