Watch Series: The Human Spark Released in (2010) - Season 1 produced by USA, The TV Series categorized in Documentary, and content rating TV-G with duration 55 min broadcasted as these networks PBS, Streamed at Putlocker & directed by Larry Engel. After some three and a half billion years of life’s evolution on this planet – and after almost two million years since people recognizable as human first walked its surface – a new human burst upon the scene, apparently unannounced. It was us. - Season 1