In May 1972, the CIA launched Operation Thunderhead to rescue escaped American soldiers from a North Vietnamese prison. Here's why James Bond Stockdale and the other "Hanoi Hilton" POWs decided to shut it down.

Researcher Margaret Howe's initial focus with Peter the dolphin was teaching him the basics of human conversation: getting him to listen to speech, then encouraging him to "speak."

After racial discrimination was legally outlawed in 1964, southern public schools began to desegregate, and black students started to learn alongside white students. Now, decades later, meet the men and women who made history.

For hazmat driver Ben Moorhead, a grueling workday starts at the crack of dawn. Here, he walks us through what it's like to transport oil for a living and the science involved in safely testing his precious cargo.

It's a bloodbath - and a big meal for hungry crocodiles - when millions of migrating wildebeest attempt to cross the Mara River.

Adolf Hitler wrote "Mein Kampf" while serving time in prison. But it was after he became German chancellor that he figured out a way to make millions from it.

To untangle Tut's family tree, experts examined DNA from 10 royal mummies suspected to be related to the pharaoh. The results are in.

A giant constrictor that swallows its prey whole, the reticulated python is one of the longest and most powerful snakes in the world.

John Wilkes Booth knew he had to act quickly to save the South. But his original plan wasn't to kill Lincoln, it was to kidnap him.

Sightseers watch Pia Glacier, hoping to see a piece of ice break apart and crash into the freezing water. Just as patience begins to wear thin, the glacier starts to rumble, and then suddenly, it moves...