M mark1313 Well-known member Joined Jul 20, 2012 Messages 144 Location Phoenix Arizona. Aug 14, 2012 #1 http://www.scientificamerican.com/article.cfm?id=gates-toilet-tech-challenge" onclick="window.open(this.href);return false;
http://www.scientificamerican.com/article.cfm?id=gates-toilet-tech-challenge" onclick="window.open(this.href);return false;