PreviousCosmic Ancestry: The Modern Version of Panspermia
http://www.panspermia.org/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.
Submitted in section: Extraterrestrial Life: Panspermia: Cosmic Ancestry: The Modern Version of Panspermia