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=== 泛种论===

=== 泛种论===

泛种论是一种假说，即生命存在于整个宇宙，由流星体、小行星、彗星分布。<ref name="cometary panspermia"/>

泛种论是一种假说，即生命存在于整个宇宙，由流星体、小行星、彗星分布。<ref name="cometary panspermia">{{cite journal| last=Wickramasinghe|first=Chandra| title=Bacterial morphologies supporting cometary panspermia: a reappraisal| journal=International Journal of Astrobiology|year=2011| volume=10| issue=1| pages=25–30 | doi= 10.1017/S1473550410000157 |bibcode = 2011IJAsB..10...25W|citeseerx=10.1.1.368.4449|s2cid=7262449}}</ref> and [[Small Solar System body|planetoids]].<ref>Rampelotto, P. H. (2010). "Panspermia: A promising field of research". In: Astrobiology Science Conference. Abs 5224.</ref>