| Literature DB >> 11538278 |
H J Morowitz1, D W Deamer, T Smith.
Abstract
The earliest fossil stromatolites present evidence of a complex ecosystem of photosynthetic organisms. Because the origin of present life can be dated within a few hundred million years prior to these fossils, their complexity poses a problem. A heuristic model outlines the first radiation leading to the universal ancestor.Keywords: NASA Discipline Exobiology; NASA Discipline Number 52-20; NASA Program Exobiology; Non-NASA Center
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Year: 1991 PMID: 11538278 DOI: 10.1007/bf02100670
Source DB: PubMed Journal: J Mol Evol ISSN: 0022-2844 Impact factor: 2.395