Whether it’s a lioness aggressively protecting her cubs or a chimpanzee defending his territory against unfamiliar rivals, life in nature is not always peaceful. The reasons animals clash with each ...

Mice lacking an olfactory system have had their sense of smell restored with neurons from rats, the first time scientists have successfully integrated the sensory apparatus of one species into another ...

What does it feel like to be a rat? We will never know, but some very unusual mice may now have an inkling. In a series of new experiments, bits of rat brain grew inside the brains of mice. Donor stem ...

NEW YORK — Ines Moore stirs awake nearly every night to an unmistakable, skin-crawling sound: rats skittering around her apartment in the dark. Sticky traps scattered around the tidy, fifth-floor ...