One thing natural selection is powerless against is selecting for or against anything in an organism post-reproduction. Hence, our bodies are fairly impotent when it comes to fighting cancer (with many exceptions, of course). The mechanisms of evolution are simply blind to most cancers.
It is for this reason that I must delay today's edition of the Carnival of Evolution. My grandfather "Papaw" finally and thankfully ended a long fight with lung cancer thirty minutes before midnight on New Year's Eve. He had just received word that day that the cancer had spread pretty much all over and the prospects for '09 were not looking particularly pleasant.
So, in perfect characteristic fashion, Papaw proceeded to thumb his nose at the potential of an agonizing death by having a heart attack in his sleep.
He will be missed by many.
The next edition, which was due to be published today, will be published as soon as I return from the funeral next week. Much apologies to all contributors. Rest assured - you will all be included.