At the end of World War II, Adolf Hitler faced the reality of defeat and committed suicide. Then his body mysteriously disappeared. The FBI spent years tracking false leads and sightings of Hitler. What happened to the German leader's remains?

Could one of Leonardo da Vinci’s lost works of art be hidden between a wall of an ornate building and another masterpiece? It’s a captivating theory that has had one prominent scientist chasing a legend for more than 30 years. This is the exclusive behind-the-scenes story of the hunt for a priceless masterpiece that could lead to one of the greatest discoveries the art world has ever known.

Teams of Egyptologists hunting Egypt's lost treasures in the Valley of the Kings.

Napoleon's Final Battle. By exploring the astonishing and dramatic course of Napoleon's 100 Days - the period during which Napoleon escaped from exile and marched on Paris to conquer Europe once again – The Emperor Strikes Back opens the essential window that reveals the inside story behind modern history's greatest conqueror. Critical moments from the end of his career - from Napoleon's initial abdication, failed suicide and banishment to his unprecedented return to Imperial glory and his ultimate humiliating defeat - dovetail with flashbacks from throughout his life and military career.

There's been a revolution in manufacturing and international logistics in the last 10 years. What used to take a month to make and deliver now takes just a day and nowhere is this more evident than in the USA - an economic powerhouse at the heart of the global economy. In this brand-new series, we unveil the incredible scale and human ingenuity behind the manufacture and transportation of some of America's biggest, global brands.

Examining the advances in engineering that made some of the world's most iconic structures possible. In a landmark CGI-driven series, BIG, BIGGER, BIGGEST reveals the inventions that enabled structures to grow in size and scale.

In the shadow of the world’s oldest pyramid, a team of archaeologists led by Dr. Ramadan Hussein uncovers the first Egyptian funeral parlor ever found.

Uncovering the long-lost shipwrecks of legendary captains reveals why the Caribbean — more than all other seas — became famous for pirates.

Dedicated first responders, veterinarians and animal caretakers from the Alaska Sealife Center, the Alaska Raptor Center and the Alaska Wildlife Conservation Center brave dangerous terrain and unforgiving climates to respond to animals in need.

Existing only in legend, an ancient Egyptian city lies buried beneath the waves of the Mediterranean; after 2,000 years, secrets are revealed.

The National Geographic Channel EXPLORER series takes on the August 6, 1945, U.S. Air Force atomic bombing of Hiroshima, Japan, in this chronological retelling of the 24 hours following the event.

Following the Department of Homeland Security Customs and Border Protection agency as they operate on the 28 bridges connecting the United States of America and Mexico.

With dramatic real-life footage captured by the rescuers themselves, Extreme Rescues puts viewers in the center of the action for every heart-stopping second.

Following the wildly successful "Cosmos: A Spacetime Odyssey," Neil deGrasse Tyson returns as host to translate more revelations of science into a lavish transporting experience, taking audiences on a series of spiritual voyages of exploration. The show reveals previously uncharted realms, including lost worlds, worlds yet to come, and the worlds that humans may one day inhabit. Ann Druyan, original creative collaborator to Carl Sagan, whose iconic docuseries "Cosmos" provided inspiration for this series, serves as executive producer alongside Seth MacFarlane.

How a deadly embrace between science and state altered the fate of the world, and a gripping cautionary tale of mass casualty and unlikely survival.