Death Valley's Sailing Stones Caught In the Act
Capt.Albatross (1301561) writes "The flat surface of the Racetrack Playa in Death Valley is littered with rocks, some weighing hundreds of kilograms, each at the end of a track indicating that it has somehow slid across the surface. The mechanism behind this has been the subject of much speculation but little evidence, until a trio of scientists caught them in action with cameras and GPS."
I for one am glad that you did. The site the article calls home purley sucks. I'm on my phone and when you make the text large enough to read, a flash menu and a bunch of social networking crap floods the page so you can only see two words in a line.