Popular Science

SLIPPERY SLOPE

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Glacial caves fill with water during the day and then freeze solid overnight, giving climatolog­ists a limited window of time to drop in and study their eccentric, constantly shifting features. In 2018, Shone and a pack of Welsh researcher­s had to wriggle down the silky, narrow walls of this chute in Switzerlan­d to measure how quickly the ice was shifting due to the region’s rapidly changing climate. “I guarantee this geology is no longer there,” Shone says.

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