As his epic new series continues Stephen Hawking sets three ordinary people a series of fun challenges to try and get them to understand what they really are. In this episode the volunteers are led to an amazing realization about the nature of life itself.

Originally released by PBS, 2016. Streaming video file encoded with permission for digital streaming by Infobase on February 13, 2017.

Contraption (2:14); --Machine of Life (3:30); -- Drop of Information (2:28); -- The Human Contraption (3:25); -- How We Are Made? (3:01); -- Amino Acids (3:53); -- Life Appears (2:59); -- Life Begins (3:43); -- Primordial Soup (4:07); -- Reproduction (4:01); -- Shape Launcher (4:02); -- Natural Selection (3:51); -- Firework Timeline (3:19); -- Order of Life (2:32); -- Beginning to End (4:03); -- Credits: Genius By Stephen Hawking: What Are We? (1:34); .