Lost samples from a secret army base reveal that Greenland's ice vanished 416,000 years ago. That means it could melt way faster than expected.

Tech Insider
Two reserachers, Lyle B. Hansen and Chester Langway, lean over a grey-brown piece of core with engrossed looks on their faces. The man on the left is pointing with a gloved hand to something on the core we can't see, he appears to be saying something.
Lyle B. Hansen and Chester Langway inspecting the sub-ice core from the Project Iceworm drilling.

Photograph by David Atwood, U.S.

Subscribe to Ice Cores