Fresh Air on KAZU

The new Disneynature film Chimpanzee started off the way most movies do. Co-producers and directors Mark Linfield and Alastair Fothergill, who had previously worked together on the documentary film Earth, approached Disney with a 70-page script about a group of chimpanzees living in Western Africa. There was just one problem: Chimps don't take direction — or read scripts.

So Fothergill and Linfield teased out a narrative from more than three years' worth of footage they took in Western Africa while observing a large clan of chimpanzees.

If you've ever had a bacterial infection like staph or strep throat, your doctor may have prescribed penicillin. But if you've had the flu or a common cold virus, penicillin won't work. That's because antibacterials only kill bacteria, and both the flu and the common cold are viruses. So for illnesses like the flu, doctors prescribe antiviral drugs, which target the mechanisms that viruses use to reproduce.