Excerpt
JUDY WOODRUFF (Newshour): It's not just in scifi movies. Asteroids really are moving closer to Earth more frequently and chunks of them are hitting too.
The one that caught everyone's attention struck last February, when a meteor hit near the Russian city of Chelyabinsk. It was only 60 feet wide, but injured more than 1,200 people.
New research about that meteor and other asteroids was published yesterday. Experts say fragments are hitting 10 times more often than known before.
NewsHour science correspondent Miles O'Brien fills us in.
Miles, hello there.
So what was it about this incident in Russia that has caused scientists to believe that these rocks may be hitting Earth more often?
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