Update: November 22

A hammerhead shark locates a stingray hiding beneath the ocean floor. Unnerved, the stingray makes a dash for freedom but is it too late?

Hammerhead vs. Stingray (2:25)

The bust of Nefertiti contains one of the most beautiful faces in the world. So beautiful, a mathematical formula was used to sculpt it.

How to Achieve Flawless Beauty (2:54)

One highly influential ancient Middle Eastern civilization established some of the essential systems we still use today. Think you know which it is?

Who Decided to Put 60 Seconds in a Minute? (2:33)

In 1992, Christopher McCandless set off to test if he could survive alone in the wilds of Alaska. It didn't go as planned.

What Happened to Chris McCandless? (3:38)