ANIMALS

Many grain-free dog food brands billed as healthier options have been linked to a rise in heart disease cases among dogs in recent years.

Scientists usually study male lab rats because they believe that females’ hormonal changes would skew results, but there’s more to the story.

The number of fats cats and plus-sized dogs is on the rise. A new report from a veterinary group warns that chronic health conditions can be the result.

The durable little killifish egg can travel along the swan's digestive tract and later hatch, which might explain how some fish wind up in isolated freshwater locations.

The endangered tapir faces threats like poaching, habitat loss, and trafficking, but Nai Conservation, an organization in Costa Rica, is leading a grassroots effort to save the species.

For animals, the 18th-century naturalist Carl von Linné introduced the system of binominal nomenclature, where animals have names composed of two parts.

Large, intelligent marine mammals like whales and dolphins will soon be banned from aquariums and amusement parks in Canada.

When the new intern at the Coco Palm Dhuni Kolhu isn't caring for the resort's turtles, they'll be dining and snorkeling for free.

The agency recently released documents revealing it had tested at least two samples of hair purporting to belong to Bigfoot. The results were surprising.

An animal doesn't need to be a pig, a peacock, or something just as unconventional to qualify. What constitutes an emotional support animal has little to do with the pet itself and more to do with its owner.

Vultures are natures clean-up crew, swiftly flying in to rid our nations highways of roadkill—among other acts that help the environment.

The giant Seychelles tortoise, who resides on the island of Saint Helena, is closing in on the two-century mark.