In this NOVA scienceNOW series, host Neil deGrasse Tyson tackles one of science's major challenges in each episode of Where Did We Come From? He will guide us as he explores dramatic discoveries and the frontiers of research that connect each central, provocative mystery. Topics include: Revealing the Origins of Life; Origins of the Solar System; Lice and Human Evolution; and Profile: Andre Fenton.

Nova scienceNow (Television program). Originally released by Public Broadcasting Service (U.S.), 2011. Streaming video file encoded with permission for digital streaming by Infobase on December 15, 2015.

Birth of a Solar System --(4:16) -- Hunting for Meteorites -- (3:21) -- Significant Supernova Blast -- (4:36) -- Tree of Life -- (5:09) -- Recipe of Life -- (6:25) -- Development of Clothing -- (4:02) -- Clothing Lice -- (3:14) -- Loss of Body Hair -- (3:36) -- Memory is Our Identity -- (6:42) -- Maintaining Memories -- (5:01) -- Final Thoughts -- (1:34) -- Credits: Where Did We Come From? -- (1:42).