Rapid global cooling 13,000 years ago challenged early occupants of Alaska to adapt. People used to hunting mammoths and other megafauna with big stone tools suddenly found their weapons shattering in the cold. Access to the stone they used to make them got buried under snow. As with any climactic change, the cold resulted in […]
The headlines paint a dire picture: By the 2030s, global warming could completely melt Arctic sea ice, imperiling the 19 known polar bear populations that range across the United States, Canada, Russia, Greenland, and Norway. Could, as some fear, the trend spell extinction for Ursus martimus?