Why is it that a squirrel may calmly take food from a picnic table while a deer runs as if its life depends on it at the snap of a twig? For years, ecologists have asked whether animals always treat ...

Across the planet, animals are increasingly suffering from chronic illnesses once seen only in humans. Cats, dogs, cows, and even marine life are facing rising rates of cancer, diabetes, arthritis, ...

Decades of data reveal that animals involved in the wildlife trade—from pet sales to meat markets to illegal poaching—are ...