This symposium presents varied perspectives from earth scientists, ecologists, and paleoanthropologists on how climate may have shaped human evolution, as well as the prospects for the future of world climate, ecosystems, and our species with Jeff Severinghaus on Abrupt Climate Transitions and Humans, followed by William Ruddiman on How Humans Took Control of Climate, and Charles Kennel on The Impacts of Arctic Sea Ice Retreat on Contemporary Climate. Recorded on 5/2/2015. (#29684)