"Do you like history, perhaps investigating where your family came from or learning what challenges your ancestry met and where they called home? This course traces some of the wanderings of our wider family, the biosphere, from its first appearance on Earth around 4 billion years ago through to the present day. This journey has been a fantastic one, with many interesting twists and turns along the way, many high points and more than a few crises."--Page 1 of course guidebook.