Ancient, Melting Ice Patches On Mountain Slopes Yield Clues To Athabascan History
WRANGELL MOUNTAINS: Over 14,000 years ago, much of North America was covered in ice, starting at the Alaska Range, and moving down all the way to what are now the cities of Chicago and New York. The ice was very thick — miles thick. Then, it abruptly melted over much of the northern hemisphere. Except in […]