On February 15, 2013, a meteor exploded over Chelyabinsk, Russia, creating the most powerful atmospheric entry event in recorded history since the 1908 Tunguska explosion. The superbolide entered Earth's atmosphere at approximately 9:20 a.m. local time, traveling at over 40,000 miles per hour. The meteor measured roughly 20 meters in diameter and weighed an estimated 12,000-13,000 metric tons before its explosive disintegration. The airburst occurred at an altitude of about 18.5 miles above the

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How many meteorites hit Earth every year?

Will an Asteroid Ever Hit Earth? We Asked a NASA Scientist: Episode 3 - NASA