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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
If a scary asteroid will actually strike Earth, here's how you'll know
"It becomes a national emergency event."
By Mark Kaufman
How scientists find the big asteroids that can threaten Earth
"You need to know what's coming, when it's coming, and how hard it's going to hit."
By Mark Kaufman
