Frogs' secret disposal system revealed
http://www.nature.com/news/2010/100105/full/news.2009.1170.html?s=news_rss&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+news%2Frss%2Fmost_recent+%28NatureNews+-+Most+recent+articles%29&utm_content=Google+Feedfetcher