A new look at the melting of Greenland's ice sheet more than 115,000 years ago reveals that even though the climate was much warmer than today's, the ice was only a few hundred feet thinner than in modern times. Given that sea level was also much higher during this long-ago period, the findings mean that Antarctica must have experienced major melt to boost the oceans. These results could hint at what's to come in today's warming world, the researchers report Thursday (Jan. 24) in the journal Nature. "Even though the warm Eemian period was a period when the oceans were...