Comment of the Day: Weekend Reading: Michael S. Gazzaniga: A Road Trip to the Origins of Our Species: "'Even the trip over, in which 220 animals calmly accepted their shared use of the hugely complex technology of a jet plane...':
...Sarah Blaffer Hrdy draws on that example in the introduction to her book Mothers and Others http://www.amazon.com/Mothers-Others-Evolutionary-Origins-Understanding/dp/0674060326, and points out that a similar number of Chimpanzees would emerge with many individuals badly maimed. What makes humans so different? Her book proposes that part of an answer to Gazzaniga's question is cooperative child-rearing, not found in other great apes. Highly recommended.