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 ...

Antarctica's Filchner-Ronne Ice Shelf may be under threat due to relatively warm water from the deep sea flowing towards the shelf. Is climate change to blame? When you purchase through links on ...