Kaguya Has Two Moms

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But scientists now have a better understanding of the biological underpinnings of procreation. "In spite of all the differences between men and women--our fights, arguments and seeming incompatibility--at the end of the day you still need a set of male and female genes for the species to go on," Kono says. "I find that fascinating." --With reporting by Toko Sekiguchi/Tokyo