This Nova episode aired 5/24/17. I can't recommend it highly enough. The story of the biggest asteroid impact on Earth since the 1908 Tunguska, Siberia event, which completely flattened millions of trees. This was the Chelyabinsk meteor event, which airburst over the city of the same name, which is also located in Siberia, in Feb., 2013. If not for the shallow angle of entry, over 1 million people would have died. As it is, the shock wave did considerable damage, injured more then 1000 people, mostly with flying glass, and the explosion of this asteroid yielded energy greater then our largest hydrogen bomb. The footage here is fantastic. The Russians are big fans of car cams, and many angles were captured, making the event a field day for scientists. The low frequency sound wave from this once in a century event circled the Earth for a full 24 hours. In effect, the Earth actually rang for 24 hours following this amazing air burst. It was a reminder that there is a bigger one out there somewhere, with our planet's name on it. Superb documentary on the biggest such event in our lifetime.
Edit, 9-21-21. The Nova episode is no longer available to view free. Here is another documentary on the Chelyabinsk fall:
Edit, 9-21-21. The Nova episode is no longer available to view free. Here is another documentary on the Chelyabinsk fall:
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