"Climate change is likely the triggering factor, but it happens there because you have the thinning of the permafrost due to the gas," lead author Helge Hellevang at the University of Oslo in Norway told New Scientist.
"I think their idea makes sense," Lauren Schurmeir at the University of Hawai'i, who has also published research on the craters but was not involved in the study, told New Scientist.
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