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Cosmic ancestry
Cosmic ancestry is a hypothesis of the origin of life on Earth, based on the panspermia views of Fred Hoyle and Chandra Wickramasinghe. Cosmic Ancestry speculates that life, like the universe itself, has no date of origin, and has always existed and can only descend from ancestors at least as highly evolved as itself.〔(Introduction: More Than Panspermia )〕 Under this belief, life on Earth was delivered from space. This belief stands in stark contrast to the theory accepted by most cosmologists that the age of the universe is roughly 13.8 billion years, and that sufficient evidence is not available to presume whether life exists outside the Earth, let alone the age of that life.
==History==
Hoyle was a long-standing advocate of strong panspermia. He claimed (with Wickramasinghe) that spectral analysis of interstellar dust indicated that large organic molecules and even bacterial spores occur in space.〔F. Hoyle and C. Wickramasinghe. "On the Nature of Interstellar Grains" p 77-90 v 66 Astrophysics and Space Science. 1979〕 He also viewed natural selection and mutation as too weak a mechanism to drive evolutionary progress.〔F. Hoyle, Mathematics of Evolution p 97-109 ISBN 0-9669934-0-3; Memphis: Acorn Enterprises LLC, 1999〕 Moreover, his belief in a quasi-steady-state universe allowed him to consider the possibility that life was much older than orthodox cosmology would allow. Whilst Wickramasinghe and Hoyle referred to their ideas as either panspermia or cosmic ancestry (), the latter term has come to be associated with an expanded hypothesis proposed by Klyce, which incorporates the Gaia hypothesis of James Lovelock.
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