"Mutations in a single gene may have turned the AIDS virus from a fairly benign infection of monkeys and apes into a global pandemic that has killed more than 25 million people, researchers said yesterday." Washington Post, FINDINGS, June 16, 2006, p. A16.
The intelligent-design crowd is going to have to take that into account when they say that evolution just couldn't have produced human beings and other species, because (they claim) there just hasn't been enough time for all those mutations to have survived and reproduced ....