Origin of Life

Authors: Ashwini Kumar Lal

The evolution of life has been a big enigma despite rapid advancements in the fields of biochemistry, astrobiology, and astrophysics in recent years. The answer to this puzzle has been as mind-boggling as the riddle relating to evolution of Universe itself. Despite the fact that panspermia has gained considerable support as a viable explanation for origin of life on the Earth and elsewhere in the Universe, the issue remains far from a tangible solution. This paper examines the various prevailing hypotheses regarding origin of life like abiogenesis, RNA world,iron-sulphur world, and panspermia; and concludes that delivery of life-bearing organic molecules by the comets in the early epoch of the Earth alone possibly was not responsible for kick-starting the process of evolution of life on our planet.

Comments: 32 pages, 8 figures, invited review article (published in Astrophysics & Space Science, 2008, volume 317, issue 3-4, pp.267-278), minor addition

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Submission history

[v1] 20 Jun 2010
[v2] 30 Aug 2010
[v3] 31 Aug 2010
[v4] 2012-01-24 02:17:24

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