I think you're wrong here. The 'craters' on the picture are defenately something different.
If it was that common, the scientists and/or the people would know about it. What we're talking about here is very rare.
If it was that common, the scientists and/or the people would know about it. What we're talking about here is very rare.
https://www.google.fi/maps/place/Poluostrov+Yamal,+Jamalo-Ne...
If you somehow would get a hole in the ground, it does not sound that far fetched to me it would get filled with water over time.
And of course other people have noticed this too. It is just, that many times the most vocal ones are the people who have a belief system/agenda to drive. How things really are, is not a matter of an opinion.
> Russian scientists have now spotted a total of seven craters, five of which are in the Yamal Peninsula. Two of those holes have since turned into lakes.