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Two 'Gates of Hell' sinkholes in Siberia have widened at the same time
There's another crater around 400 miles away at a ski resort that's already known as a 'Gate to Hell' and it's said this ...
THE WEEK6mon
Inside Siberia's 'megaslump' – and why it is getting bigger
These deep craters "appear like gateways to the underworld", said Treehugger. These "eerie sinkholes" are the result of melting permafrost – the frozen soil and rock that makes up the majority ...