When Did Life Originate

Progress has quickened during the last 10-15 years on a basis of modern achievements in biochemistry and relative sciences. However, still existing limitations of fossil records, uncertainties in the interpretation of isotopic data, and especially the dark spot of the Earth s geological history before 3.8-4.0 billion years ago leave 

Such a brief geological period of life origin would have clearly sufficed for global proliferation of progenotes or their genote descendants. Recent analyses indicate that substantial differentiation among the bacterial, archean and eukariotic lineages could 

Is the Earth Sufficiently Old to Originate Life (after Fenchel et al, 1998) There are some theoretical considerations on the period of life s origin on the Earth based on the requirement of a definite time period for protein molecule evolution. 

However, one can put a question, if not on Earth, when and where was life originated and transported to our planet As it is considered that Earth is one-half to one-third the age of the Universe, then even it is not sufficiently old to originate life. 

To resolve this dilemma, some argue for divine creation some invoke the many n-dimensional Universes. Obviously, these latter explanations are far from scientific approaches. Another view is connected with recognition of the inherent limitations of the time estimates above, and propose that the need for an extraordinaryly long incubation period is obtained by invoking a plausibly small pool of amino acids, about 10 or so, short catalytic peptides, 10-20 residues, with some tolerance for sequence variability and non-random searches of only portions of the total sequence space due to the existence of chaotic attractors. Under these assumptions, a much slower reaction rate (for instance, lO -fold slower) in only a fraction of the ocean is more than sufficient to account for rapid, less then 1 million years evolution of complex, possibly living, organic systems. 

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