Your own bone marrow stem cells injected into your heart may or may not turn into heart muscle. Regardless of what does or doesn't happen, it seems to improve damaged hearts. Being a mouse may or may not help. http://www.genomenewsnetwork.org/articles/2004/03/22/heart.php -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.