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Finding a second sample of life on earth

Davies, P C W; Lineweaver, Charles


If life emerges readily under Earth-like conditions, the possibility arises of multiple terrestrial genesis events. We seek to quantify the probability of this scenario using estimates of the Archean bombardment rate and the fact that life established itself fairly rapidly on Earth once conditions became favorable. We find a significant likelihood that at least one more sample of life, referred to here as alien life, may have emerged on Earth, and could have co-existed with known life. Indeed,...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: Astrobiology
DOI: 10.1089/ast.2005.5.154


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