Far up a giant Amazon jungle tree, a large howler monkey walked among the branches. As it stepped from branch to branch, its long tail would wrap around a convenient trunk providing extra stability.

Opossums also have more teeth than any other North American mammal; back feet with an opposable digit; and a tail that can ...

rat-like prehensile tail, which aids in climbing. No wonder they’re so often mistaken for rats of unusual size! But that’s where the similarities between the opossum and rodent end.