Comets could have brought the basic ingredients of life to Earth, scientists revealed yesterday.
The first analysis of samples that Nasa's Stardust mission brought back to Earth from a comet earlier this year has revealed that comets contain a richer range of ingredients than previously thought, including the complex molecules needed to kick-start biology.
The findings will force a re-evaluation of the traditional thinking on comet formation. "We think we know what these things are made of and then suddenly we find that, no, we don't," said Monica Grady, an astronomer at the Open University who worked on the Stardust samples
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Stardust may be basis of life on Earth | Science | Guardian Unlimited
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