BBC NEWS | Science/Nature | Probe yields Earth defence clues

"Japan's Hayabusa spacecraft is providing an unprecedented insight into one of the
many asteroids that cross into Earth's neighbourhood.

Data from the mission shows Itokawa is a relatively young body formed out of debris
from the collision of two larger objects."

More at http://news.bbc.co.uk/1/hi/sci/tech/4823526.stm
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