Watch The Great Human Race

Bill and Cat must survive a land of ice and snow. With nighttime looming, they will have to find a way to withstand below-freezing temperatures.

Bill and Cat follow in the footsteps of the first Americans to cross the Bering Land Bridge 15,000 years ago.

Bill and Cat are nomadic pastoralists in Mongolia, with animals that need to be moved to the mountains before temperatures reach freezing.

Existing as Siberian hunters during the ice age, Bill and Cat have to use their natural resources to make tools that establish their survival.

Bill and Cat search for shelter along the Caucasus Mountains, a journey some of our ancestors made to escape the bone-chilling temperatures of the Ice Age 40,000 years ago.

Explorers must find a way to get to the coast in hopes of finding food and resources.

Cat and Bill follow in the footsteps of early Homo sapiens as they make their way through the Arabian Desert. Their mission is to locate dried riverbeds and follow them to the seasonal monsoon area along the coast. But to do so, they must endure blistering heat and desolate sands. Food is nearly impossible to find and their water supplies quickly run low.

Archaeologist Bill Schindler and survival instructor Cat Bigney follow in the footsteps of where Homo sapiens first walked the Earth, through the mountains of Ethiopia. This is where humans became the dominant species, by going from hunted to hunter. Schindler and Bigney attempt to hunt using the methods of our earliest ancestors. After little success in the lowland prairie, they move into the higher elevations, where the thin air and thick fog present unforeseen challenges.

Cat Bigney and Bill Schindler journey into the jungles of Uganda to follow in the footsteps of one our earliest ancestors -- Homo erectus.

Survival expert Cat Bigney and Archaeologist Bill Schindler survive the wild savanna just as primitive people did 2.6 million years ago.