Dinosaur Tracking: Snowbirds From Another Era

It's no secret that Charles IV, king of Bohemia, possessed the Spear of Destiny. But the way he brandished it in public reveals his savvy understanding of mythology and power.

Unlocking the Spear of Destiny's True Power (3:56)

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)

Why saying cheese just didnt happen in the early days of photography.

Ask Smithsonian: Why Don’t People Smile in Old Photographs? (1:12)

Green tree vipers can kill in the dark. With special heat-sensing abilities, they can find prey that's all but invisible.

A Pit Viper's Sixth Sense (2:03)