An expedition will leave today to probe a giant crater that has appeared in gas-rich northern Siberia. Extraordinary aerial images show a mysterious hole which experts say may be up to 262 feet (80 meters) wide, in the Yamal Peninsula of northern Russia.
The cause of the hole's sudden appearance in Yamal - which translates as 'the end of the world' - is not yet known. One Russian expert says the cause is more likely to be global warming releasing gases under the surface, which then explode like a champagne cork. Experts say that the darkening around the inner rim of the crater indicates 'severe burning' which scorched its edges.
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