Prehistoric (Pre 8000 BC)

After Copenhagen: Real Solutions for Global Climate Change
James Hansen
January 28, 2010
01:42:00
The December 2009 Copenhagen talks on global climate change failed to produce a new international accord, and environmental scientist James Hansen is not wasting time bemoaning that failure.
Sarah Hrdy: Evolutionary Origins of Mutual Understanding
Sarah Hrdy: Evolutionary Origins of Mutual Understanding
Sarah Blaffer Hrdy
November 18, 2009
01:15:14
Anthropologist and primate sociobiologist Sarah Blaffer Hrdy discusses her newest book, Mothers and Others: The Evolutionary Origins of Mutual Understanding, in which she emphasizes the need to consider our Pleistocene ancestors' peculiar mode of child-rearing.
Throwing Fire: Projectile Technology Through History
Alfred W. Crosby
August 23, 2007
00:36:38
Alfred Crosby reads from his latest book, and explores how the global environment can be radically altered by collective human behaviors.