Millions of people around the world glimpsed the first giant hole after it was revealed by The Siberian Times here and on The Siberian Times TV here.
Now news has emerged of two new similar formations in the permafrost, prompting more intrigue about their creation.
Theories range from meteorites, stray missiles, a man-made prank, and aliens, to an explosive cocktail of methane or shale gas suddenly exploding.
The version about melting permafrost due to climate change, causing a release of methane gas, which then forces an eruption is the current favorite, though scientists are reluctant to offer a firm conclusion without more study .... http://siberiantimes.com
