Video duration: 97 seconds
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Read more: http://environment.n ewscientist.com/chan nel/earth/mg19826621 .600?DCMP=youtube
New Scientist features editor David Cohen narrates his journey to the site of the Tunguska explosion in Siberia.
Video duration: 58 seconds
Global video hits: 92044
The 2K22M Tunguska-M1 is a Russian tracked combined surface-to-air gun/missile system. It is designed to provide day and night protection for infantry and tank regiments against low-flying aircraft and helicopters in any weather condition. The complete system is designated 2K22M, with the vehicle designated 2S9M.
The cost of the system is reported to be between 8 and 10 million USD.
Video duration: 10 seconds
Global video hits: 3015
June 30 marks the 100th anniversary of a huge mid-air explosion that flattened hundreds of square miles of forests in Siberia. Recent computer simulations show it might have been a smaller near-earth object than previously theorized -- and thus the kind that hits Earth more frequently. Learn more at nytimes.com/dotearth and sandia.gov (video courtesy of Sandia National Lab)
