Martians, UFO’s, and the 100th Anniversary of the Tunguska Impact

[riky]

Martians, UFO's, and the 100th Anniversary of the Tunguska Impact
      

Today, June 30, marks the centennial of the Tunguska event, the only instance in recorded history of a very large object striking the Earth. By sheer good luck it struck in a mostly uninhabited region of Siberia, at a spot so remote that it was 19 years before scientists were able to study it firsthand.
         

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