Not only is the crater already the largest of its kind, almost 1 km (0.6 miles) long and 86 metres (282 feet) deep, but it's getting bigger all the time.
Siberia's 'doorway to the Underworld' Is Getting So Big It's Uncovering Ancient Forests
It's no secret that Siberia's permafrost has been on thin ice lately. Conditions are varying so much that huge holes are appearing out of nowhere , and, in some places, tundra is quite literally bubbling underneath people's feet .
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