Male hormones help lemur females rule

Lemur girls behave more like the guys, thanks to a little testosterone, finds a new study. When it comes to conventional gender roles, lemurs -- distant primate cousins of ours -- buck the trend. Researchers say females have significantly lower testosterone levels than the males across the board. But when they compared six lemur species, they found that females of species where females dominate have higher testosterone than females of more egalitarian species.