
Sleep literally cleans your brain. During slumber, more cerebrospinal fluid flushes through the brain to wash away harmful proteins and toxins that build up during the day.
When Facebook introduced the News Feed in 2006, people freaked out. TIME called it “Gen Y’s first official revolution.”

Amerigo Vespucci, for whom many historians believe America was named, was an Italian merchant.

It is possible to go blind from smoking too heavily.

Zebras are black with white stripes not white with black stripes.

The Golden Gate Bridge is about four times taller than the Leaning Tower of Pisa.

The dot over your lowercase “i” is called a tittle.
Cap’n Crunch’s full name is Horatio Magellan Crunch. He’s also been called out for only having the bars of a Navy commander, but the so-called cap’n held his ground on Twitter, arguing that captaining the S. S. Guppy with his crew “makes an official Cap’n in any book!”.
Jim Henson made his first Kermit puppet using his mother's old coat and two halves of a ping pong ball.

Sharks are some of the most ancient animals on earth. The oldest known sharks date back about 420 million years.

There are over 6,500 languages spoken in the world.

Helmets weren't mandatory for football players until 1939.