Scientists design “gravity tractor” to save earth from asteroids

July 28th, 2009 LONDON - A new study of ancient rocks in Greenland has suggested that icy bcomets/b - not rocky asteroids - launched a dramatic assault on the Earth and bmoon/b around 3.85 billion years ago, thus causing the lunar surface to become scarred.

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Scientists design “gravity tractor” to save earth from asteroids

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