As far as we know life evolved once in the universe – here on Earth in the form of life as we know it. Could life have originated in other conditions with different raw materials? If so, we may be sharing the planet with lifeforms we don’t recognize yet.

Did Mallory Make it to the Top of Everest First?
52:48

The Hindenburg Disaster
50:02

Short Stuff: Did Tippi Hedron start the Vietnamese manicure industry?
12:58