Deforestation in the Philippines may have caused infertile hybrids of endemic frogs, study finds

In 1996, when herpetologist Rafe Brown accompanied a few biologists to the Philippine island of Mindanao to study frogs, they heard a cacophony near their campsite. In a puddle that skirted the forest, hundreds of chubby frogs with big, bright eyes had gathered, looking for mates to breed with…