An anonymous reader quotes a report from CNN:Models show that the latest time this kind of ice plain melting occurred was between about 15,000 and 19,000 years ago, "during a period of warming that ended the last Ice Age," notes the report."[W]e hadn't seen it play out live before, certainly not at this rate," said Naomi Ochwat, a study co-author and postdoctoral associate at the University of Colorado Boulder.