Russian fireball shows meteor risk may be bigger

Russian fireball shows meteor risk may be bigger

WASHINGTON (AP) - Scientists studying the terrifying meteor that exploded without warning over a Russian city last winter say the threat of space rocks smashing into Earth is bigger than they thought. Meteors about the size of the one that streaked through the sky at 42,000 mph and burst over Chelyabinsk in February – and ones even larger and more dangerous – are probably four to five times more likely to hit the planet than scientists believed before the fireball, according to three studies published today in the journals Nature and Science.

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