T he turning point for Moreangels Mbizah came in 2014. The conservation biologist was in Hwange national park in Zimbabwe , scanning the savannah to monitor the movements of lions for her zoology PhD research. The GPS signal told her something was wrong. One of the lions had strayed into a nearby village, putting itself and the local community at risk. Mbizah and her team took off to try to herd it back into its habitat. Shouting and screaming echoed from the village as the team approached. When they arrived, it was a horror show. “We saw these people standing around a bush,” she says. “They were crying. We found that the lion had killed a young boy.” The scene was chilling: about 30 villagers stood in a helpless standoff, watching the lion guard a seven-year-old’s body between its paws. The wildlife authority was called and killed the animal so the body of the boy could be retrieved. Fewer than 20,000 lions remain in the wild.…