http://www.netvouz.com/spisio/tag/am?feed=rss spisio's bookmarks tagged "am" on Netvouz http://biotech.blogs.ca/2006/09/19/ancient-viral-dna-may-be-essential-to-mammal-reproduction/ A recent experiment supports the theory that certain DNA sequences in mammals, which originated from ancient retroviruses, played a key role in the evolution of the placenta. spisio Tue, 19 Sep 2006 21:12:09 GMT