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Published online 9 March 2007 | Nature | doi:10.1038/news070305-15
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Astronomers hash out defense against asteroids
A billion dollars needed to spot potential killer impacts.
Astronomers trying to save the world from Earth-threatening asteroids have this week composed a white paper outlining the threat and what needs to be done about it.
Although it isn't their first white paper on the subject — that was released in 2004 — it is the first mandated by Congress.
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