If you are interested in facts, it is always better to read the scientific article ("A large impact crater beneath Hiawatha Glacier in northwest Greenland"), if

If you are interested in facts, it is always better to read the scientific article ("A large impact crater beneath Hiawatha Glacier in northwest Greenland"), if you can[1][2]. I stopped reading this summary at "and the released steam, a greenhouse gas, could have locally warmed Greenland, melting even more ice." Yes, steam is a greenhouse gas. No, that is not why Greenland may have been warmed by the steam. The steam itself is hot and would melt more ice. I can't find the word "steam" mentioned in the science paper. Gell-Mann amnesia effect I suppose. [1]http://advances.sciencemag.org/content/4/11/eaar8173 http://advances.sciencemag.org/content/4/11/eaar8173 [2]http://advances.sciencemag.org/content/advances/4/11/eaar8173.full.pdf http://advances.sciencemag.org/content/advances/4/11/eaar817...