In the Andes Mountains of northern Peru, a long-tailed mammal with a “facial mask” moved through the undergrowth. Suddenly, the ground dropped out underneath its hairy paws, and it fell into a ...

"It's super cute if you're lucky enough to spot that." Opossums also have more teeth than any other North American mammal; back feet with an opposable digit; and a tail that can grab objects (known as ...

Scientists caught small mammal with facial mask, long snout in trap at national park and discovered new species: Chachapoyas mouse opossum, study said.