Old Mike
http://www.sciencedaily.com/releases/2011/09/110930123057.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sciencedaily+%28ScienceDaily%3A+Latest+Science+News%29&utm_content=Google+Feedfetcher
Here is the study done back in 2000.
http://www.ncbi.nlm.nih.gov/pubmed/11121904