El'gygtgyn: Probably world's largest meteorite crater

LANDSAT imagery indicates that El'gygytgyn in northern Siberia is probably a giant meteorite crater, the largest Quaternary impact structure on Earth, and not a tectonic depression. This probability is supported by the remarkable circularity of the crater, as outlined by the ring-mountain rim, remoteness from modern volcanic sites, and lack of collapse scalloping of the margin.