http://www.sciencefriday.com/ Science news and video from the makers of the public radio program Science Friday. en-us http://www.sciencefriday.com/images/ns2007/feedlogo.jpg http://www.sciencefriday.com/ http://www.sciencefriday.com/videos/watch/10252/ How did multicellular organisms evolve? Sophia Tintori and Cassandra Extavour, a developmental biologist at Harvard, talk about the development of multicellular organisms, and in particular the specialization of reproductive cells. Visit CreatureCast.org for more intriguing animal stories. http://www.sciencefriday.com/videos/watch/10252/ CreatureCast: Why Cells Cooperate How did multicellular organisms evolve? Sophia Tintori and Cassandra Extavour, a developmental biologist at Harvard, talk about the development of multicellular organisms, and in particular the specialization of reproductive cells. Visit CreatureCast.org for more intriguing animal stories.