www.bio-medicine.org/inc/biomed/biology-news.asp <a href="http://feeds.bio-medicine.org/latest-biology-news">http://feeds.bio-medicine.org/latest-biology-news</a> University of Florida researchers have learned how to selectively shut down a flyweight-sized genetic molecule that packs a heavyweight punch, a discovery that may help doctors better understand cancer, birth defects and other health problems.