The Operation IceBridge scan data were publicly available, allowing Danish glaciologists to identify the depression beneath Hiawatha Glacier.
Notes on verification
Corroborated by NASA press release, University of Kansas press release, and the peer-reviewed Science Advances paper (Kjær et al. 2018), all consistent in describing public IceBridge data enabling Danish glaciologists' discovery of the Hiawatha crater depression. [tier=gold indep_score=0.988 clusters=4 claim_tier=notable]
Sources
- City-size impact crater found under Greenland ice (seed:history_and_archaeology)
- https://www.nasa.gov/news-release/international-team-nasa-make-unexpected-discovery-under-greenland-ice (corroboration)
- https://www.science.org/doi/10.1126/sciadv.aar8173 (corroboration)
- https://interestingengineering.com/science/nasa-international-researchers-discover-massive-crater-under-greenland-ice (corroboration)
- https://news.ku.edu/news/article/2018/11/13/huge-crater-discovered-greenland-impact-rocked-northern-hemisphere (corroboration)