Efrain Cab, a 34-year-old beekeeper who runs a hotline for stingless bees in need, stood in front of the wall of a hotel in Playa del Carmen, Mexico, with a hammer in his hand. He had responded to an emergency text from 11-year-old Eugenia, who had secretly contacted Cab from her mother’s phone. She wanted to save the bees her parents intended to fumigate. Eugenia now pointed at a small hole in a brick wall. “Put pieces of tissue inside your ear, and do not squash them when they get…
