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sexual differences in the animal kingdom

Odd Couples: Extraordinary Differences between the Sexes in the Animal Kingdom

While we joke that men are from Mars and women are from Venus, our gender differences can’t compare to those of other animals. For instance: the male garden spider spontaneously dies after mating with a female more than 50 times his size. Female cichlids must guard their eggs and larvae—even from the hungry appetites of their own partners. And male blanket octopuses employ a copulatory arm longer than their own bodies to mate with females that outweigh them by four orders of magnitude. Why do these gender gulfs exist? In this lecture, based on her book, Dr. Daphne J. Fairbairn explores some of the most extraordinary sexual differences in the animal world.

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