An obvious exception occurred on February 15 , 2013 , when an asteroid as large as 55 feet in diameter with a mass of up to 10,000 tons crashed to earth in the Urals region in Russia , streaking through the morning sky in Chelyabinsk before landing in a fiery explosion that injured more than a thousand people and caused an estimated $ 33 million in damage . A new map shows an asteroid barrage across planet Earth . NASA detection program reveals hundreds of asteroid strikes . Asteroid in Chelyabinsk , Russia , was largest to impact planet during mapping . Comment:
A new map shows an asteroid barrage across planet Earth . NASA detection program reveals hundreds of asteroid strikes . Asteroid in Chelyabinsk , Russia , was largest to impact planet during mapping . Comment: