's proved in 2022 that humans could redirect 'city killer' asteroids away from Earth - but with unintended consequences that could put our planet in danger.A pair of Italian astronomers found that when the Double Asteroid Redirection Test (DART) craft rammed the 560-foot-wide asteroid Dimorphos off its course, the collision created a cloud of 37 new space boulders that is shooting toward .If one of these boulders hit the red planet, it could create a crater between 200 and 300 meters across - 656 to nearly 1,000 feet.
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