The damage caused by an asteroid impact depends on its size. But how big a space rock must be to cause an apocalypse?
5. 2,560-foot-wide , the size of Didymos
The good news is that the larger the asteroid, the rarer it gets. On top of that, astronomers believe thatImpacts of asteroids wider than a mile would be felt across entire continents.How much destruction an asteroid wreaks depends on several factors. Most important is its mass and the velocity at which it zooms through Earth's atmosphere before disintegrating or hitting the ground, Collins said.
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