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Cosmic Ancestry: The Modern Version of Panspermia The Cosmic Ancestry hypothesis - about which this site has a large amount of information - treats all of evolution, not just the origin of life on Earth, as due to interaction with cosmic microorganisms.
Panspermia Revisited Short scientific article by John R. Gribbin. "Spreading of life-bearing spores across the Galaxy (panspermia) may be easier than is usually acknowledged."
Search for ET! Interactive Flash tutorial exploring the possibility of and search for life on other worlds.
The Planetary Society A nonprofit organization devoted to the exploration of the solar system and the search for extraterrestrial life.
