Females also mate with more than one partner. Apparently doing this enables females to find partners with better genes or who are better providers.
Male lactation: Fact of fiction? That’s the question on today’s Moment of Science. In 1979, a scientist concluded that there is no insurmountable physiological reason that men can’t lactate, or produce breast milk. In fact, there are a couple of cases where elderly men who received estrogen to treat prostate cancer were actually induced to [...]