The Ig Nobel Prize winners for 2012

Grand mother strategy cuts across species as a way to further the tribe. "Males become more fecund as they get older, so in Darwinian terms, it pays to have long-lived sons." Since the mom is probably a working dolphin... wait, what were we talking about? Right, pan-species strategies. Looks like it works beyond our own. And that's why women don't keep bearing young for long: they must concentrate on the next generation of theirs...