Researchers found a previously undiscovered hepadnavirus in an immunocompromised cat.

Scientists and others have been opening their homes to research animals after the studies conclude, with legislation in some states now mandating adoption.

In one winning paper, scientists describe an insect whose females have evolved a penis-like appendage that penetrates males’ “vaginas.”

A round-up of recent discoveries in behavior research

Estimating only 7,100 individuals remaining, researchers urge a reclassification of the species from vulnerable to endangered.

Companies focused on developing treatments for dogs, cats, and horses are bringing a diverse array of products to the pet medicine market.

Studying tumor development and treatment in dogs and cats, in parallel with research on rodents and humans, could improve the successful translation of new cancer drugs.

The fungal and bacterial communities in household dust can reveal some details about a building’s inhabitants.

Mounting and drilling a comet, mind-controlled gene expression, and dissecting cat genomes