A huge ice sheet appears to have melted about 120,000 years ago, when temperatures were similar to those on Earth today, according to a DNA study that mapped octopus movements.
Earlier this year it was clear Antarctic sea ice levels were low. Now, as the continent enters spring, it’s obvious that “it’s a really exceptional year.”
As the earth warms, glacial archaeologists are in a race against time to preserve objects before they are destroyed by the elements. Recent field work yielded a surprisingly intact 3,000-year-old arrow.
Each September, the ice at the top of the world hits its lowest extent of the year. Researchers are studying how a warming climate is affecting a not-so-frozen ocean.