The Future is (Still) Here: Day Two of Smithsonian’s Second Annual Conference

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)

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)

With the development of better flight technology, commercial air travel received an unprecedented boom in the 1960s. But to fully sell the glamor of flying, the airlines needed these women on board.

Air Travel Was a Party, and They Were the Hosts (2:57)

Da Vinci's The Last Supper plays a key role in the 2006 blockbuster hit The Da Vinci Code. Although the film's claims are more fiction than fact, could the painting actually contain a message from Leonardo?

Does 'The Last Supper' Really Have a Hidden Meaning? (4:03)