Weekend Edition Sunday for August 16, 2009
Dean Jose Bowen at Southern Methodist University's Meadows School of the Arts. Courtesy Jose Bowen hide caption

Dean Jose Bowen at Southern Methodist University's Meadows School of the Arts. Courtesy Jose Bowen hide caption
The spiny, venomous lionfish can kill three-quarters of a reef's fish population in just five weeks, according to one study. Michael Dwyer/AP hide caption
Charles Kibe, right, a volunteer who works with HIV/AIDS-infected people in the Korogocho slum in Nairobi, Kenya, attends a patient at a health clinic in December 2007. Simon Maina/AFP/Getty Images hide caption
