At http://phys.org/print335611854.html … and sent in by Gary, the same story is at www.dailymail.co.uk/sciencetech/article-2841829/The-largest-landslide-Earth Researchers-reveal-ground-really-did-Utah-21-million-years-ago-shifting 55-MILES-minutes-killing-path.html … which has more pictures and a map that refuses to load on to this page. This is a geological story that has changed over the years, variously dated 21 or 22 million years ago and previously thought to be a series of land slips that took place over a long period of time. Now they are saying there was just the one – and it was big. It covers some 1300 square miles and ground shifted by 55 miles in total killing all the fauna and flora in its path – and it all happened in minutes.