[40] See George Page, Inside the Animal Mind: A Groundbreaking Exploration of Animal Intelligence (New York: Doubleday, 1999); Michael Hanlon, “The disturbing question posed by IQ tests – are chimps cleverer than us?” Daily Mail (December 5, 2007), click here Christine Kenneally, “Animals and Us, Not So Far Apart,” The Washington Post (April 13, 2008). click here and “Still dumber than a chimpanzee,” New Scientist.com (February 13, 2009), click here
[41] See Peter Singer, A Darwinian Left: Politics, Evolution, and Cooperation (New Haven and London: Yale University Press, 1999).
[42]Felipe Fernandez-Armesto, Humankind: A Brief History, p. 12.
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