‘DID THE WEST ANTARCTIC ICE Sheet completely collapse during the latest interglacial period, about 125,000 years ago? It’s an important question for climate scientists, but geology was giving them no answers. So they turned to genetics instead.

Enter Turquet’s octopus (Pareledone turqueti), a cephalopod with a four-million-year pedigree that makes its home in the icy waters around Antarctica. Recent DNA analysis shows that two distinct populations of this species, one in the Weddell Sea and the other in the Ross Sea, mated about 125,000 years ago.

This could only have happened if the massive ice sheet that now separates those populations wasn’t there at the time. So yes, it did collapse. And that’s bad news, because it increases the likelihood that it will happen again….’ (Atlas Obscura)