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Rebuilding the World

Rebuilding the World
What you see along the sides of most glaciers are rocks that have been scraped by the movement of ice. You can make guesses as to when the glacier passed a particular spot based on what’s growing there—bare rock means the ice just left; horsetails mean a half dozen or more warm summers have passed; trees mean the glacier left a long time ago. Hubbard, however, is not in retreat, so it reverses all these markers: The glacier is chewing trees off the channel’s side. A normal glacier is a glimpse of the old world returning; Hubbard’s advance shows what could happen next instead.
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Yakutat, AK, USA