• November 24, 2011

    Episode 365: Comet Bombardment

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    Over 3 billion years ago, comets bombarded the inner solar system, scarring and cratering the Moon. The comets also struck Earth, delivering water and carbon to our planet. Crucial ingredients for life were deposited on the surface, and the first evidence for life appears shortly after this period. New data from the Spitzer Space Telescope suggests that the system around a star called Eta Corvi may be undergoing this type of event now, giving us a look at what may have happened early in the history of our solar system.