Ghost Factories: Lead's toxic legacy in our soil May 2
Hour 1 In hundreds of U.S. neighborhoods, including several in Philadelphia and the surrounding area, the soil that children play in is contaminated by lead and other toxic metal particles once spewed into the air by factories that [...]

Understanding the influence of the ancient Maya May 2
Hour 2 There is a lot of talk about the Maya civilization this year. That's because the according to their calendar, the 2012 winter solstice this December is a big deal.  It marks the end of their 5,125-year [...]