Potentially Dangerous Asteroid Turns Out to Be a Rubble Pile

August 13, 2014 7:26 PM

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Potentially Dangerous Asteroid Turns Out to Be a Rubble Pile

An asteroid on NASA's list of potential impact threats to the Earth is actually a pile of loosely connected rubble held together by forces weaker than the weight of a penny, scientists say.

The discovery could be vital if humanity ever has to destroy a space rock before it hits Earth.

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