THREE MINUTE TEASER

Using himself as bait, Mike finds out how much piranha are attracted to human flesh.

Abandoned by their paid “coyote” guide in the desert, a group of illegal immigrants contact border patrol for a rescue.

In this episode, Border Patrol agents uncover a hidden tunnel that leads straight from across the border and into downtown.

Diving the Labyrinth series on National Geographic Channel.

An Alaskan summer means warmer temperatures, longer days and a lot more people out and about. More troopers are also required...

As night falls the troopers brace themselves for a night of rowdy antics and arrests.

See how Allied forces' pursuit of this German battleship led its captain to evacuate and destry the vessel in 1939.

Witness the daily struggles faced by three characters who find it difficult to answer one question: are you a boy or a girl?

Attaching a crittercam to the dorsal fin of a Great White Shark is a risky endeavor.

Based on Martha Raddatz’s best-selling book, "The Long Road Home" relives a heroic fight for survival when the 1st Cavalry...

Experts investigate whether someone can really be capable of killing while they're asleep and if sleepwalking is a valid...