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Scientists are only now starting to unravel the secrets of comets. Often referred to as dirty snowballs they contain ice and elements from the very start of the universe. Some theorize that a comet crashing into our planet brought with it the organic material that started life on Earth. Spacecraft continues to offer new information on their makeup from bringing back samples from a comets tail to direct contact when a NASA-launched craft slammed into the comet Tempel-1.   ... >>
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Video Length: 2819
Date Found: December 07, 2010
Date Produced:
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July 17, 2011
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July 13, 2011
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July 11, 2011
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July 05, 2011
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July 04, 2011
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