An international team of researchers who extracted ancient mammoth DNA from a sample of 500 bones reports that Ice Age humans selectively targeted female woolly mammoths. The new research pointed to a clear answer: these discoveries can be attributed directly to human hunting and organization. Around 70 percent of the mammoths found were female, suggesting that during the Ice Age, strategic hunting was being undertaken. The question remains why hunters preferred females over males, which also seems unusual since killing more female mammoths would decrease the population, and therefore decrease the overall food supply of Ice Age hunters. The recent study, “Palaeogenomic sex inference of mammoth remains sheds light on the anthropogenic nature of bone accumulations,” appeared in the journal Current Biology.