Once again, the notion of junk dna takes a hit.
"In the junkyard of the human genome, Yale scientists have identified a few pieces of DNA that are more than just scrap metal. Assistant professor of genetics James Noonan and a team of other geneticists recently found a sequence of genes among what was traditionally considered to be “junk DNA” that may have contributed to unique aspects of human-limb development — such as the opposable thumb."
