Until recently, experts thought that King Djedefre was a murderer and outcast who couldn't possibly have had the power to create the Great Sphinx. But new evidence makes him a more likely candidate.

Kevin Murphy, an iron worker who helped both recover the wreckage of the Twin Towers and construct their replacement, watches proudly as the spire is placed on One World Trade Center.

By analyzing the hair of a mummy and excavating an ancient tomb, researchers find clues about the Nazca's class system.

Curious young cheetahs fearlessly confront the camera crew.

Wonder Woman's creator William Moulton Marston, was a Harvard trained psychologist and inventor; his wife is believed to be the model for the superheroine.

With less than 1,600 giant pandas remaining in the wild, spotting a wild giant panda is rare. After 10 days of waiting, our film crew's patience pays off.

The recovered galley of Air France Flight 447 reveals that the aircraft was flattened when it hit the Atlantic Ocean. It also points to a startling case of pilot error.

Mongooses and snakes are each other's deadliest opponents. When they face off, the outcome is utterly unpredictable.

What do snowflake eels and the movie 'Alien' have in common? A deadly second jaw.

At Johnson Space Center, engineers are working on a Deep Space Habitat, where astronauts will eventually live and work on Mars.