Two of the Navy's top trained divers attempt to reach the bottom of the North Sea.

EXPIRED CLIP DO NOT PUBLISH - A Daring Deep-Sea Dive (3:59)

Scream's iconic villain Ghostface was inspired by a real serial killer who preyed on young students in the college town of Gainesville, Florida.

[PAUSED - Duplicate] The Inspiration Behind Scream's Ghostface (2:50)

Thousands rushed to California to find gold and get rich quick, but the people who actually made their fortunes were the merchants who built their businesses to serve the forty-niners.

EXPIRED CLIP DO NOT PUBLISH - How to Make Money in a Gold Rush (2:35)

Sometimes, in fact, nature is stranger than fiction

Weird Science: Female Ferrets (0:15)

The government agency used birds, cats and even dolphins to help them on covert operations

VIDEO: The CIA Trained These Animals to Spy for Them (0:59)

When a high-tech helicopter like the Sikorsky S-92 needs to be transported on a cargo plane, it's crucial that every rotor blade is dismantled and stowed away with care. That's because each one costs over $200,000.

The First Step to Shipping a Chopper? Remove the Blades (3:41)

CCRCVidFInal.mp4 (2:47)

Using Questions in the Classroom (5:49)

Larry Bird, author of Souvenir Nation, reveals rare artifacts from deep within the American History Museum's archives