Massive mystery holes appear in Siberian tundra — and could be

The dramatic 30-meter (100-feet) deep hole in Western Siberia is the latest of several to have formed in the region since 2014. Scientists think the craters are formed by an explosive buildup of methane gas but there is still a lot they don’t know.

Massive mystery holes appear in Siberian tundra — and could be

Climate change may be behind the massive craters forming in

What do you think is the biggest threat for humankind, global

What do you think is the biggest threat for humankind, global

The mystery of Siberia's exploding craters

Two new mysterious craters emerge in Siberia, deepening giant hole

If global warming is being caused by humans today, what caused it

What are some global warming causes and effects? - Quora

Massive mysterious craters discovered in Siberia

Climate change may be behind the massive craters forming in

What are some global warming causes and effects? - Quora

A 165‑Foot‑Deep Crater Burst Open In Siberia's Arctic Tundra

Giant new 50-metre deep crater opens up in Arctic tundra

Scientist explains how massive Siberian craters are formed

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