All part of evolution <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
They did another experiment.... They tracked down a number of people who all had their appendixes removed, along with both their parents had to had the operation in their youth (before they had kids).
40 % of the kids born to these people, had no appendix. and in the cases where even the grand parents had their appendixes removed, 70% were born without appendixes...
There is a "rule of thumb" so to speak when it comes to evolution... and this includes immunity to diseases.. Biologists found that if a species can survive a specific disease for 3 generations ( lets put it bluntly, produce fast enough, so that 3 generations will have had kids before they die), then the human body is 30 % evolved / immune to that disease.
That is also one of the big HOPES that doctors have, that the human race will become immune to aids. If they can get the people to live long enough to produce 3 generations babies born with aids, and get them to live long enough to have offspring with aids, we will see examples of aids immunities. And there already are cases of children that are immune to the virus. Or more correctly said, that are infected, but dont get symptoms of it, and dont become ill from it. And even 2 or 3 cases that i know of, where if tissue of a hiv - baby, born from an hiv positive mother, gets introduced to the virus, the virus cannot live in that tissue...
they dont understand all of it yet, but so far it is assumed that fetuses evolve according to the mother's conditions and diseases.
