Scientists at Cardiff University are saying that the recent studies of comets reveals them to be the most likely source of life on Earth.

The 2005 Deep Impact mission to Comet Tempel 1 discovered a mixture of organic and clay particles inside the comet. One theory for the origins of life proposes that clay particles acted as a catalyst, converting simple organic molecules into more complex structures. The 2004 Stardust Mission to Comet Wild 2 found a range of complex hydrocarbon molecules – potential building blocks for life.

from ScienceDaily.com

This is truly fascinating news. It turns the solar system into an ecosystem of its own, with little seeds of life zinging about.

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