The Lost World.

National Geographic takes us to a lost world, hidden under Antarctic ice for 14 million years:

Researchers found the freeze-dried remains of mosses, algae, small crustaceans, and beetles in the McMurdo Dry Valleys, where glacial lakes once existed.

The site also contains a layer of potassium-rich volcanic ash, which can be precisely dated, allowing researchers to pinpoint for the first time how long ago the plants and animals lived.

They seem to be saying that a volcanic explosion back then suddenly made the temperature drop in Antarctica. Otherwise, they say, it’d be pretty much just like Tierra del Fuego.