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Asteroid Strikes 10 Times More Likely Than Previously Thought

Asteroid strikes similar in size to the explosion over Russia in February may be 10 times more likely than previously thought, according to a paper published in the journal Nature.

Using infrasonic detectors that can identify smaller bodies missed by telescopes, strikes from impactors between 10 and 50 meters in diameter may occur every 20 or even 10 years, compared with an earlier estimate of once a century, according to research led by Peter Brown at the University of Western Ontario in Canada.