作者:莘予     |      日期:2019-03-07 07:20:00
By Philip Cohen EARLY humans may have systematically massacred some of the world’s largest wildlife. Detective work by two groups of researchers has fingered humans as the chief suspects in two of palaeohistory’s most intriguing murder mysteries—the extinction of the giant animals and birds of North America and Australia more than 10,000 years ago in the Pleistocene era. A spectacular array of North American animals disappeared around 11,000 years ago, including woolly mammoths, sabre-toothed cats and ground sloths. Tens of thousands of years earlier, Australia experienced a similar extinction of megafauna, including Genyornis, the heaviest bird known,