| Remembering vaguely from highschool biology.. I believe that everytime cells reproduce, the RNA strands get shorter over the course of our life, until finally they can't reproduce anymore. And for some reason cells die off regularly on their own, so this reproduction is necessary.
I spose that might be a fundamental problem with organisms, but as long as there was nothing preventing the pass on of genes to the next generation, there was no evolutionary cause for edging out our expiry date trait. |