On Ellesmere Island in the Arctic, on one of the northernmost points of land in the world, sits a small permanent seismic ...

Past ice sheets have retreated rapidly, raising global sea level at rates >1 cm per year, with marine ice sheets collapsing and terrestrial ice sheets retreating in a more gradual fashion.

This story appears in the January 2018 issue of National Geographic magazine. We see evidence of the kill first: a shockingly broad spread of scarlet, probably the blood of a ringed seal, on snow ...