Bats that weigh no more than a handful of coins screech 100 times louder than rock concerts, a discovery that could help design advanced robots. Not only are bats the only mammals that can truly fly, ...

Dark against the autumn sky, its branches broken and twisted, with mysterious black holes and cracks in its bark, a dead tree might seem spooky. But to many animals, it’s home. Bats, screech owls, ...