Controversial impact crater under Greenland’s ice is surprisingly ancient
New date of 58 million years undercuts idea that strike triggered recent
1000-year plunge in temperatures By Paul Voose, Science News, March, 9, 2022
Giant impact crater in Greenland occurred a few million years after
dinosaurs went extinct by University of Copenhagen, PhysOrg
Wikipedia article discussing Hiawatha impact structure
The open access paper is:
Kenny, G. G., and others, 2022, A Late Paleocene age for Greenland’s
Hiawatha impact structure. Scie