At an estimated 19 miles wide, the Hiawatha impact crater would rank among the 25 largest known impact craters on Earth.
Sources
- City-size impact crater found under Greenland ice (nationalgeographic.com)
- https://www.science.org/doi/10.1126/sciadv.aar8173 (science.org)
- https://www.earthobservatory.nasa.gov/images/144279/crater-lurks-beneath-the-ice (earthobservatory.nasa.gov)
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