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The Biggest Kangaroos Evolved Long Arms to Fight Over Females

Male kangaroos and wallabies, like a lot of seemingly quiet grazing animals, get into knock-down drag-out fights over females. They obviously don’t have antlers or horns to spar with, but they’re perfectly willing to grapple rivals with their forelimbs and kick the crap out of each other with their big hind feet. » 7/01/15 6:00pm 7/01/15 6:00pm

Do men and women experience orgasms differently?

It's something that many of us think about from time to time: Is an orgasm the same whether it is experienced by a male or a female? It's a fair question given that men and women tend to follow different arousal patterns during sex — and by virtue of the fact that we have different parts. But as the science is… » 11/05/12 6:40am 11/05/12 6:40am