Observing Greenland from a helicopter, the main problem is one of comprehending scale. I have thought we were skimming low over the waves of a fjord, before noticing the tiny shadow of a seabird far below and realizing what I suspected were floating shards of ice were in fact icebergs the size of office blocks.

Recent findings have raised alarm among scientists about the Greenland Ice Sheet’s stability, revealing that crevasses—deep fissures in the ice—are growing at a much faster rate than previously expected.