May 18. Top photo shows a landslide. However, as experts admit, it's not a landslide, but something new. Very, very slowly moving mass of land, according to boingboing.net
In the Snake River Canyon, Wyoming, this stream of mud moving down the hill toward the highway at a speed of 50 meters per hour, said Dave Loop of the American Geophysical Union.
In the video, you can watch the event in the accelerated motion.