More and more papers are showing that evolutionary mechanisms can explain the
evolution of biological complexity.
I ran across this one on talk.origins
http://www.pnas.org/cgi/content/full/97/9/4463
Abstract
To make a case for or against a trend in the evolution of complexity in
biological evolution, complexity needs to be both rigorously
defined and measurable. A recent information-theoretic (but intuitively
evident) definition identifies genomic complexity with the
amount of information a sequence stores about its environment. We investigate
the evolution of genomic complexity in populations
of digital organisms and monitor in detail the evolutionary transitions that
increase complexity. We show that, because natural
selection forces genomes to behave as a natural "Maxwell Demon," within a
fixed environment, genomic complexity is forced to increase.
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