sinkholes

sinkholes

Yet Another 'Mystery Sinkhole' Discovered In Russia!

1h ago
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http://www.undergroundworldnews.com They are starting to pop up all over Siberia. Some have also been discovered within the past year in Russia. It is still a mytery still to exactly what causes these sinkhole type crater formations! http://abcnews.go.com/International/photos/incredible-sinkholes-world-18651806/image-sinkholes-discovered-siberia-24757036