With apologies to scientists who automatically read "Extraterrestrial" and think "beyond earth"...<p>Did anyone else see this title and expect to see a story about a flying saucer crash and little green men? :)
Worth noting that this about an impact causing the Younger Dryas (AKA Long Lomond Readvance)<p><a href="http://en.wikipedia.org/wiki/Younger_Dryas" rel="nofollow">http://en.wikipedia.org/wiki/Younger_Dryas</a><p>A lot of the interesting features on Scottish mountains (e.g. very obvious periglacial trimlines) date to this period.<p>Edit: It's interesting that the article talks about multiple impacts - including one in the Middle East, perhaps the origin of what became the accounts of the destruction of Sodom and Gomorrah. Complete speculation on my behalf, of course!