Humans are probably safe from a catastrophic asteroid strike - for now

June 17, 2019

If you ever clean out the gutters on your roof, take note: The dirt you’re tossing may have come from outer space. “In an average day, about 100 tons of meteor dust falls on the planet,” May writes. “One of the best places to find it is on non-porous surfaces like city rooftops and gutters . . . The sludge in your gutter almost certainly contains a few particles that came from outer space.”

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