“Mystery Hole”, 1984 (KING 5 News)
A huge chunk of earth, weighing 3 tons, was moved 70 feet near Grand Coulee, Washington. And no traces were found on the surface of the ground near the hole. The hole seems to be perfectly round.
At 1:38 minutes into the video TV news reporter Leslie Donovan says, “But the answer may come from something we don’t understand. (Greg) Behrens (federal geologist) isn’t ruling out the possibility of an extraterrestrial cause.”
This phenomenon attracted scientists from all over the U.S., and stumped them all, according to KING 5 News:
http://www.youtube.com/watch?v=JxpBc64mtYE
Greg Behrens,U.S. Federal Geologist
Leslie Donovan,KING 5 News Reporter