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Why Are We The Only Humans Left?

Season 5 Episode 14 | 6m 09s

In part 2 of our special series on human ancestry, we ask why we are the only surviving branch on the human evolutionary tree. Just 50,000-100,000 years ago, Earth was home to three or four separate human species, including our most famous cousins: the Neanderthals. New research has shown that Neanderthals were not the brutish, unintelligent cavemen that cartoons make them out to be.

Aired: 04/24/17
Extras
A man dies on a bus and Bea is warned off the case, but she refuses to stop investigating.
Shane investigates the future of bees, from honey bees to wild native species, in a changing world.
A body disappears from the morgue. Patience has a connection to the case.
The competition returns to Nashville as eight home cooks compete to win "The Great American Recipe"!
Sixty million American bison once thundered across the prairies of North America.
A bestselling crime writer is found dead behind locked doors and all is not as it seems.
We enlist allies from nature to fight in our battles. But is the enemy of an enemy always a friend?
Shane traces how cane toads conquered Australia — and how science is turning the tide.
From ducks to drones, Shane explores how farmers fight pests with nature — not chemicals.
A body in a museum exhibit leads the team into the shadowy world of fossil smuggling.
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