A large crater lies underneath Greenland’s Hiawatha Glacier—a well-known, but little-studied part of the planet. Now scientists…
A large crater lies underneath Greenland’s Hiawatha Glacier—a well-known, but little-studied part of the planet. Now scientists hope to determine if it could be linked to a controversial extinction theory.https://t.co/sjp6uSq9Au
— National Geographic Magazine (@NatGeoMag) November 15, 2018
(via http://twitter.com/NatGeoMag/status/1063138509886758913)