Claim: Space aliens or UFOs. There is absolutely no evidence whatsoever of an extraterrestrial cause, whether by force of nature such as meteorites or an asteroid, much less than intelligent alien life. For others there are more sophisticated lies.
Claim: A Collapsed Pingo. A pingo is a type of conical hill found in tundra permafrost areas in Eurasia and the Americans. the ground projects upwards on-top of this growing bed of freezing water being absorbed in that area of the ground, often cracking near the summit of the hill as it grows and partially collapsing in on itself.
Claim: A naturally occurring gas explosion, climate change induced. We could not find any clear evidence such a naturally occurring gas explosion, in Siberian tundra, with warming permafrost, due to a mix of salt and water, has ever been documented.