from the original on 2017-06-12) Giant Crater Found: Tied to Worst Mass Extinction Ever Robert Roy Britt (SPACE.com) 1 June 2006 6:07 p.m. ET Does a giant crater lie beneath the Antarctic ice? Bibliotecapleyades.net, 2 June 2006. Earth Impact Database Impact craters of Antarctica Extinction events Possible impact craters on Earth Prehistory of Antarctica Wilkes Land