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Element synthesis which started with p-p chain has resulted in severalspecific characteristics including lack of any stable isotope having atomicmasses 5 or 8. The carbon to oxygen ratio is fixed early by the chain ofcoincidences. These, remarkably fine-tuned, conditions are responsible for ourown existence and indeed the existence of any carbon based life in theUniverse. Chemical evolution of galaxies reflects in the changes of chemicalcomposition of stars, interstellar gas and dust. The evolution of chemicalelement abundances in a galaxy provides a clock for galactic aging. On theother hand, the living matter on the planet Earth needs only some elements forits existence. Compared with element requirements of living matter a hypothesisis put forward, by accepting the Anthropic Principle, which says: life as weknow, (H-C-N-O) based, relying on the number of bulk and trace elementsoriginated when two element abundance curves, living matter and galactic,coincided. This coincidence occurring at particular redshift could indicatesthe phase of the Universe when the life originated. It is proposed to look intoredshift region z = 0.5 to 2.5 (approximately t = -5.2x10E9 to -11.3x10E9years) where many galaxies have been observed and to use these data to studythe evolution of metallicity with respect to the other properties of galaxiesin order to determine the time when universal element abundance curve coincidedwith the element abundance curve of LUCA. The characteristic properties of thelatter have been transmitted by the genetic code while the universe elementabundance curve changed as the galaxies aged.

Chemical Elements Abundance in the Universe and the Origin of Life