In gripping forensic detail, this episode investigates the riddle of "Turkana Boy" - a tantalizing fossil of Homo erectus, the first ancestor to leave Africa and colonize the globe. What led to this first great African exodus? Distributed by PBS Distribution.

Encoded with permission for digital streaming by Infobase on December 08, 2013. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Introduction: The Birth of Humanity (1:58) -- Sponsors: NOVA (0:50) -- Homo Erectus (1:46) -- Before Homo Erectus (2:10) -- Turkana Boy (2:12) -- Depicting Our Ancestors (3:02) -- Dental Analysis (3:21) -- Prolonged Childhood (2:01) -- Stone Tools (1:44) -- Creating Stone Tools (1:34) -- Nutritional Needs (2:00) -- Hairless Homo Erectus (3:30) -- Hunting Advantages (1:09) -- Persistence Hunting (2:08) -- Social Animals (2:25) -- Mother Child Relationships (2:04) -- Exodus from Africa (1:52) -- Dmanisi Fossils (1:57) -- Dating the Dmanisi Site (1:23) -- Homo Floresiensis (1:36) -- Homo Floresiensis Origins (1:56) -- Migration (2:02) -- Humanity (1:41) -- Turkana Boy's Final Day (2:50) -- Conclusion: Homo Erectus (0:58) -- Credits: Birth of Humanity: Becoming Human-Unearthing Our Earliest Ancestors (1:43).