Calling someone a mutant is an insult because mutations, which are copying mistakes in DNA, are almost always bad. In fact, we know many mutations by the diseases they cause and, to make matters worse, more mutations are added to the genome every year. In his recent book Genetic Entropy and the Mystery of the Genome former Cornell University professor Dr John Sanford points out the seriousness of this problem. He shows that mutations are rapidly decaying the information within the human genome. However, this is surprising because, according to evolutionary theory, mutations coupled with natural selection is the means by which new information arises. But according to Sanford, if mutation and selection cannot preserve the information already in the genome it's difficult to imagine how it created all that information in the first place.