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Scientists find 'planet-killer' asteroids lurking in an elusive place
"We haven't found them all."
By Mark Kaufman
A meteorite punched a hole in a dog house. Now it's a collector's item.
At Christie's, one of the most popular items in its meteorite auction wasn't even a space rock.
Vigilant amateur asteroid hunters keep watch for menacing space rocks
Crowd-sourcing planetary defense.
The most mysterious asteroids in the solar system
A spacecraft is en route for the first-ever reconnaissance of these ancient objects.
By Mark Kaufman
