These familiar faces will soon be appearing on another channel. Kathy Willens/AP hide caption

Dyha Gresham (front, left), her older sister Briceshanay (in back) and Briceshanay's daughter Uri stand in their New Orleans home with the family's cat Sugar-Pepper and dog Selena. After Katrina, Briceshanay says, she relied on theater and the arts to help her "move through terrible and difficult times." Edmund D. Fountain for NPR hide caption

This genetically modified yeast can convert sugar into powerful opioid drugs. Scientists working with the modified yeast strains are required to register them with the Drug Enforcement Administration and keep the yeast under lock and key. Courtesy of Christina Smolke/Stanford University hide caption

The five young stars of Straight Outta Compton. Left to right: Aldis Hodge (MC Ren), Neil Brown, Jr. (DJ Yella), Jason Mitchell (Eazy-E), O'Shea Jackson, Jr. (Ice Cube), Corey Hawkins (Dr. Dre). Universal Studios hide caption

Curtis Carroll — also known as "Wall Street" — teaches prisoners at San Quentin State Prison about stocks. The Kitchen Sisters hide caption

At Hillary Clinton's event, Carl Babbitt raised his hand high until Clinton called on him to tell his story. Here, Babbitt holds two photos of himself — one from when he was 29, in prison serving time for murder. Tamara Keith/NPR hide caption

Monica Harwell (right) and her daughter Andrea Cleveland at StoryCorps. StoryCorps hide caption

Young pigs stare out of a pen at a hog farm in North Dakota. In coming months, consumers will start to see a new label on some packages of pork: Produced "without the use of ractopamine." Will Kincaid/AP hide caption

A brown bear in its natural habitat. Wildlife ecologists in Minnesota found that black bears in their study experienced an increase in heart rate when buzzed by drones. iStockphoto hide caption