Chemical Elements Abundance in the Universe and the Origin of Life
  Element synthesis which started with p-p chain has resulted in several
specific characteristics including lack of any stable isotope having atomic
masses 5 or 8. The carbon to oxygen ratio is fixed early by the chain of
coincidences. These, remarkably fine-tuned, conditions are responsible for our
own existence and indeed the existence of any carbon based life in the
Universe. Chemical evolution of galaxies reflects in the changes of chemical
composition of stars, interstellar gas and dust. The evolution of chemical
element abundances in a galaxy provides a clock for galactic aging. On the
other hand, the living matter on the planet Earth needs only some elements for
its existence. Compared with element requirements of living matter a hypothesis
is put forward, by accepting the Anthropic Principle, which says: life as we
know, (H-C-N-O) based, relying on the number of bulk and trace elements
originated when two element abundance curves, living matter and galactic,
coincided. This coincidence occurring at particular redshift could indicates
the phase of the Universe when the life originated. It is proposed to look into
redshift region z = 0.5 to 2.5 (approximately t = -5.2x10E9 to -11.3x10E9
years) where many galaxies have been observed and to use these data to study
the evolution of metallicity with respect to the other properties of galaxies
in order to determine the time when universal element abundance curve coincided
with the element abundance curve of LUCA. The characteristic properties of the
latter have been transmitted by the genetic code while the universe element
abundance curve changed as the galaxies aged.
