Play Four

A diver stumbles across a whale shark trapped in a commercial fishing line. Sensing the diver is there to help, the goliath lies still while the rope is cut.

A Whale Shark Cooperates With a Diver Saving Him (1:28)

Is a kiss really just a kiss? In this one-minute video, our Ask Smithsonian Host, Eric Schulze, explains why we pucker up.

Ask Smithsonian: Why Do We Kiss? (1:11)

In 1828, John Jacob Astor built a trading post on the Missouri River. Business was so profitable that it only took four decades for Astor to become America's first multimillionaire.

America's First Multimillionaire (2:49)

The superheros creator, William Moulton Marston, was a Harvard-trained psychologist and inventor and infused his daily life into the comic book.

The Origin Story of Wonder Woman (4:36)