Catastrophic climate changes from the last ice age may be repeated

Researchers analyzed ice cores collected in Greenland to provide new understanding of these sudden shifts. The cores contained data dating back 120,000 years, including evidence of sudden climate shocks called Dansgaard-Oeschger events.

These represent "tipping points" in the Earth's climate. Imagine a person standing on the edge of a cliff. One wrong step sends them into a dangerous abyss. That's the tipping point. (Sanjana Gajbhiye, more at earth.com)