giant-sink-hole-siberia

Giant Sink Hole in Siberia Russia

Giant Sink Holes, measuring 260 feet wide in Siberia, Russia are likely caused by melting ice or permafrost, according toUniversity of Alaska geophysicist Vladimir Romanovsky. At first many speculated that those mysterious sink holes where cause by either extra terrestrials or military weapons testing. One unique concept of the sink holes is that it actually erupted outside, tossing dirt …

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