"How do asteroids and meteorites relate to the origin and composition of the earth?"
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Question
if our scientists possibly find other forms of life in other planets,what we are probable to find-bacteria,virus or simply dna and protein molecules?
We do not know what form extraterrestrial life will take. Perhaps it will be similar to bacteria or other microbes, or to viruses. If we found just DNA or protein molecules, that would be extremely interesting to astrobiologists, but it might not qualify as discovering life. David Morrison
NAI Senior Scientist
May 1, 2006
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