Gelada monkeys offer evidence that abortion is part of evolutionary…

The story begins with an insurrection, and ends with infanticide. A male gelada monkey, unsatisfied with his social standing, challenges the authority of a superior gelada. The payoff: a so-called "reproductive unit," comprising a dozen females, that will mate with him and him alone. If the usurper is victorious, he… » 2/23/12 12:00pm 2/23/12 12:00pm