From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Get ready for some of the craziest, most terrifying and unbelieveable roller coasters you ever seen.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Join the hunt for pirate "Black Sam" Bellamy’s ship, which sank 300 years ago with 4.5 tons of loot.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Join the hunt for pirate "Black Sam" Bellamy’s ship, which sank 300 years ago with 4.5 tons of loot.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

A girl spontaneously bleeds from her eyes, head, hands, and other body parts, but there’s no visible injury to explain it.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Over the centuries, explorers traded tales of a lost civilization amid the dense Amazonian rainforest. A new generation of explorers have uncovered remarkable evidence that could reinvent our understanding of the Amazon and the people who lived there.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Founding father, commander of the Continental Army and America’s first president - George Washington's face is as familiar as the dollar bill. The discovery of the ruins of George Washington's childhood home reveals the man behind the myth.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

The biggest threats can come in the smallest packages.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

The largest no-kill animal facility in the U.S. helps rehabilitate problem pooches to find them new homes.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Investigators reveal their final report on what went so tragically wrong leading up to the Columbine massacre.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Sean Riley puts on his hazmat suit and heads into the radiation zone to replace a steam turbine in a nuclear power plant.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Follow the crews who shape and pour 94 million pounds of concrete to build an L.A. high rise.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Top bounty hunters Leonard Padilla and Rob Dick must overcome unusual challenges when a fugitive’s friend creates a diversion.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

As humans confront a warming planet, scientists examine the effects of a small but significant change.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Science suggests people can do extremely complicated tasks while asleep — but what about murder?

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

The economic crisis has forced countless families to give up their beloved animals — and DogTown adopts several of them.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

A man’s lifelong dream to ascend Mt. Everest becomes a hallucinatory nightmare.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

NGC takes an in-depth look at these international symbols of wealth and their connection to terrorism and crime.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Venture into a lethal gauntlet filled with barbed wire, mines, attack dogs and armed guards and hear from East Germans who risked their lives for freedom.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Explore the strategies and cutting-edge technologies employed in the most precisely-targeted large-scale air attack of all time.

From: National Geographic Channel on Sat, May 07 2011 6:57 PM

Port Police investigate a rape, a crane operator rushes to get a ship out, and security is cautious when President Carter visits.