NPR: 07-15-2007 Health & Science

Stories: 1) Iowa Farmers Look to Trap Carbon in Soil 2) Parrots Used in PTSD Therapy for War Veterans 3) Atomic Tune-Up: How the Body Rejuvenates Itself 4) Drought Threatens Navajo's Crops, Culture 5) New Telescope Attracts Rock Star to Opening Night 6) Milk Costs Surge Due to Corn