TEDxAmazonia - Joan Roughgarden | She talks about sexual diversity in nature - Nov.2011

Joan Roughgarden - Jonathan Roughgarden was a respected evolutionary biologist at Stanford University, author of an argument that there are not only two sexes in nature (male and female), but a great range with numerous variations. In 1998, on an operating table, Jonathan ceased to exist. Joan appeared, a woman. In 2004, she wrote the book "Evolution's Rainbow".
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ricky gervais has a hilarious bit on this in his stand up!!