For this week's edition of All Tech Considered, NPR's Robert Siegel talks to Carolyn de la Pena, a professor at the University of California, Davis, about her new book, Empty Pleasures -- about the evolution and impact of artificial sweeteners.
Is obesity a disease or a matter of beauty?
The American Medical Association has passed a resolution calling obesity a disease. But some people think that will only make the problem worse, if it's a problem at all.
12:45 p.m. more