Mendenhall Glacier, Juneau, Alaska
Stunning snaps from across the fields of history, nature or science
Alaska’s landscape is transforming rapidly. Glacial caves, like the one pictured here, form as the ice melts in the warmer months and water burrows its way towards the ground. A stream gathers at the base and its warmth carves a tunnel through the glacier as it drives towards its terminus, in this case a lake. Every summer, this melt causes the glacier to naturally recede up the mountain, but as Alaska’s climate changes the ice retreats further and further upwards, taking the caves with it.