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 ...

If there’s one thing that rats and mice share, it’s their cuteness. They also have similar physical features, such as huge ears, a pointy nose, and a long tail. These aspects aside, mice and rats have ...

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 ...