March 6th, 2017

3D

The permafrost hellhole

A crater formed in Siberia's permafrost is growing at an alarming rate

Near the Yana river basin, in a vast area of permafrost, there is a dramatic tadpole-shaped hole in the ground: the Batagaika crater.

The crater is also known as a "megaslump" and it is the largest of its kind: almost 0.6 miles (1km) long and 282ft (86m) deep. But these figures will soon change, because it is growing quickly.
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