Russian scientists track down fragments of Urals meteor

(CNN) -- What was in that meteor that exploded spectacularly over Russia's Urals region last week? Radioactive spores? Tiny Martians? Kryptonite? Nope, just rock and a bit of iron, according to Russian scientists who tracked fragments of the meteor to

(CNN) -- What was in that meteor that exploded spectacularly over Russia's Urals region last week? Radioactive spores? Tiny Martians? Kryptonite? Nope, just rock and a bit of iron, according to Russian scientists who tracked fragments of the meteor to

It might well be that Bill Nye has explained fully about the meteorite that showered a Russian city, but others have darker explanations. Read this article by Chris Matyszczyk on CNET News.

If a meteor was heading toward California, would residents have any warning? It all depends on the size of the space rock and the time of day. At night, astronomers can see an object hurtling toward Earth through a telescope.

Amateur enthusiasts and scientists alike are scrambling to find bits of the meteorite that streaked across the morning sky over the Russian city of Chelyabinsk Friday at a hypersonic speed of at least 33,000 mph and shattered into pieces about 18-32