Following news reports last summer of Arctic craters, a February 23 report in the Siberian Times documents several more depressions as shown in photos and satellite images.
Scientists believe the craters are caused by global warming, as underground methane is allowed to escape through warming permafrost. However, even though the craters look ominously like the inverse of Devils Tower, according to a reassuring Washington Post article, the methane from such formations is nowhere near enough to impact the atmosphere.
"Why you shouldn't freak out about those mysterious Siberian craters" [Washington Post]
