"Life is Older than Earth Itself" -- Moore's Law
- URL to an interesting spec piece in the Daily Galaxy
In a billion years life evolve from worms to mammals, so a billion years in
the future life will as far beyond us as we are beyond worms.
(Madness takes its toll. Please have exact change)
As life has evolved, its complexity has increased exponentially, just like
_Moore’s law_ (http://en.wikipedia.org/wiki/Moore's_law) which states that
the number of transistors on an integrated circuit doubles approximately
every two years. Geneticists, Alexei Sharov at the National Institute on
Ageing in Baltimore and Richard Gordon at the Gulf Specimen Marine Laboratory
in Florida, have extrapolated this trend backwards and found that by the
measure of Moore's Law, life is older than the Earth itself.
The team takes Moore's Law back to zero complexity and the _origin of
life_ (http://en.wikipedia.org/wiki/Abiogenesis) , by measuring the complexity
of life and the rate at which it has increased from prokaryotes to
eukaryotes to more complex creatures such as worms, fish, amphibians and eventually
mammals. The result is an exponential increase identical to that behind
Moore’s Law with the doubling time, however, expanding to 376 million years
rather than every two years.
The application of Linear regression of genetic complexity on a log scale
extrapolated back to just one base pair suggests the time of the origin of
life 9.7 billion years ago. This cosmic time scale for the _evolution of
life_ (http://en.wikipedia.org/wiki/Evolution) has important consequences:
life took ca. 5 billion years to reach the complexity of bacteria; the
environments in which life originated and evolved to the prokaryote stage may have
been quite different from those envisaged on Earth. Therefore they suggest
that if life takes 10 billion years to evolve to the level of complexity
associated with homo sapiens, then we may be among the first, if not the
first, intelligent civilisation in the Milky Way, negating Drakes Equation.
On the _semilog plot_ (http://en.wikipedia.org/wiki/Semi-log_plot) above ,
the complexity of organisms, as measured by the length of functional
non-redundant DNA per genome counted by nucleotide base pairs (bp), increases
linearly with time (Sharov, 2012). Time is counted backwards in billions of
years before the present (time 0). Credit: arXiv:1304.3381 [physics.gen-ph]
Additionally they suggest that the evolution of advanced organisms has
accelerated via development of additional information-processing systems:
epigenetic memory, primitive mind, multicellular brain, language, books,
computers, and Internet. As a result the doubling time of complexity has reached
about every 20 years.
Sharov and Gordon also point out that astronomers believe that our Solar
Nebula formed from the remnants of an earlier star, suggesting that life from
this period might be preserved in the original gas, dust and ice clouds.
In a form of Cosmic pansermia, _life on Earth_
(http://en.wikipedia.org/wiki/Life) may be a continuation of a process that began many billions of
years before the formation of our Solar System."
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