Seth Shostak Quotes
In 1908, there was a persuasive demonstration of the power of high-speed, low-mass asteroids in rural Siberia. The Tunguska impactor iced millions of pine trees and about a zillion mosquitoes - and was no larger than an office building.
Citations
Shostak, Seth. "The Threat of Asteroid Impacts." HuffPost, BuzzFeed, 15 Feb. 2013.
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Seth Shostak is an American astronomer and author, and is currently the senior astronomer for the SETI Institute.