A new report says NASA has only identified an estimated ten percent of asteroids. To get an idea of how much damage a mid-sized asteroid might cause, consider the Tunguska event: a 30 to 60 meter-wide asteroid that landed in a remote corner of Siberia in 1908. When it hit the ground, this modest asteroid discharged an amount of energy one thousand times greater than the atomic bomb dropped on Hiroshima, scientists estimate. It knocked down some 80 million trees over a roughly 830 square mile area. #NASA
Posted on: Thu, 18 Sep 2014 02:30:00 +0000
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