Gigantic Greenland Impact Crater Is Much Older Than Scientists Thought - Gizmodo
- Gigantic Greenland Impact Crater Is Much Older Than Scientists Thought Gizmodo
- Massive meteor crater discovered beneath Greenland's ice much older than thought CNN
- Huge asteroid slammed into Greenland just a few million years after the dinosaurs died out Space.com
- Controversial impact crater under Greenland's ice is surprisingly ancient Science
- The mysterious Hiawatha crater in Greenland is 58 million years old Science News Magazine
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