Sinkholes as big as a skyscraper and as wide as a city street open up in the Arctic seafloor - Livescience.com

Melting permafrost is causing parts of the seafloor to collapse.

Repeated surveys with MBARI’s mapping AUVs revealed dramatic changes to seafloor bathymetry from the Arctic shelf edge in the Canadian Beaufort Sea. This sinkhole developed in just nine years. (Image… [+4931 chars]

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