$$$$$ Stem cell advance challenges Bush $$$$$ <A HREF="http://www.theaustralian.news.com.au/story/0,20867,20245019-30417,00.html" target="_blank">http://www.theaustralian.news.com.au/story/0,20867,20245019-30417,00.html</A> <A HREF="http://www.timesonline.co.uk/article/0,,3-2325877,00.html" target="_blank">http://www.timesonline.co.uk/article/0,,3-2325877,00.html</A>