Joan Roughgarden, Professor Emerita, Stanford University, Author of Evolution’s Rainbow: Diversity, Gender, and Sexuality in Nature and People (2004), is one of the world experts on the biology of sex and gender. Dr. Roughgarden earned a Ph.D. in biology from Harvard University in 1971 and taught at Stanford University beginning in 1972, attaining the rank of Professor of Biology and Geophysics. She has published more than 190 papers and 8 books, including Evolution’s Rainbow in 2004 that won the 2005 Stonewall Prize for nonfiction from the American Library Association.

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