Dolphin Bubble Rings

For six weeks, luna moth caterpillars gorge themselves on the leaves of the marula tree. Then, when they're ready, they instinctively weave giant cocoons around themselves in preparation for their stunning metamorphosis.

Timelapse Footage of a Giant Caterpillar Weaving Its Cocoon (2:34)

A giant killer hornet war is waged between two colonies, and the resources, territories, and survival of a new generation are at stake. Watch the battle unfold as these huge hornets risk their lives for their kingdoms.

Two Giant Killer Hornet Colonies Battle to the Death (3:25)

There aren't many rumors that American socialite Wallis Simpson hasn't been subjected to. So here's how she actually infiltrated the British monarchy.

How Wallis Simpson Infiltrated British Royalty (4:18)

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)