Drones blasting AC/DC and Scarlett Johansson are helping biologists protect cattle from wolves

For millennia humans have tried to scare wolves away from their livestock. Most of them didn’t have drones. But a team of biologists working near the California-Oregon border do, and they're using them to blast AC/DC’s “Thunderstruck,” movie clips and live human voices at the apex predators to shoo them away from cattle in an ongoing experiment. “I...