Grimes Sweetcorn worker Paulette Vandyke waits to sell fresh corn in Grimes, Iowa. The drought has pushed the price of corn per bushel up nearly 40 percent in the past two months. Justin Sullivan/Getty Images hide caption

A replica of the pinky bone fragment found in a Siberian cave. Researchers used the bone bit to extract and sequence the genome of a girl who lived tens of thousands of years ago. Max Planck Institute for Evolutionary Anthropology hide caption

Cole Porter's "Begin the Beguine," a favorite song of listener Melanie Cowart's parents, became a fitting symbol for their relationship. Sasha/Getty Images hide caption

An unmanned U.S. Predator drone flies over Kandahar Air Field in Afghanistan in 2010. Apple has rejected an app that tracks U.S. drone strikes around the world. Kirsty Wigglesworth/AP hide caption

The aftermath of a truck bomb in Kandahar, the main city in southern Afghanistan, which wounded the provincial police chief and killed two civilians Monday. Taliban attacks against Afghan officials are up sharply this year. Mamoon Durani/AP hide caption

California farmer Erik Freese pulls down a healthy ear of corn that has been genetically engineered to produce its own pesticide. He says genetic engineering has helped him to farm more sustainably. Kathleen Masterson for NPR hide caption

On a corner in Washington, D.C., where stores burned during riots 44 years ago, there's now a plaza where farmers sell produce on Saturday mornings. Dan Charles/NPR hide caption

NPR's Cheryl Corley and producer Brakkton Booker followed Tuesday's Republican National Convention events with a trip to Tampa's trendy Ybor City neighborhood. Brakkton Booker/NPR hide caption