VIDEO: An asteroid doesn't need to be massive to do a lot of damage. The Chicxulub asteroid that wiped out the dinosaurs is estimated to have been about 6 miles in diameter. Relative to Earth, it was pretty tiny. So how big would an asteroid really need to be to wipe out New York City, one of the world's biggest urban centers?
VIDEO: An asteroid doesn't need to be massive to do a lot of damage. The Chicxulub asteroid that wiped out the dinosaurs is estimated to have been about 6 miles in diameter. Relative to Earth, it was pretty tiny. So how big would an asteroid really need to be to wipe out New York City, one of the world's biggest urban centers? Read»
VIDEO: In June 2016, NASA released a new photo of Charon, one of Pluto's moons, which shows a deep crack that is actually longer and deeper than the Grand Canyon. Read»
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