When Roberto García-Roa set off into the Peruvian jungle one morning, he was not expecting to come face to shriveled face with a zombie. García-Roa, an evolutionary biologist at the University of Valencia in Spain, was exploring Tambopata National Reserve, a slice of tropical rain forest in Peru’s southeast corner that’s famous for its biodiversity. He set off along the narrow trails that crisscross its dense vegetation in hopes of documenting some of its rarer residents, such as jaguars. But he found something else, what he calls “an unrivaled situation…
