If mice ever wonder what it's like to experience the world as a rat, some are now able to live that dream, at least when it comes to the sense of smell. Researchers led by Columbia University's ...

Two independent research teams have successfully regenerated mouse brain circuits in mice using neurons grown from rat stem cells. Both studies, using interspecies blastocyst complementation to study ...

To create mouse-rat "chimeras," researchers injected rat stem cells into mouse embryos that lacked some genes for brain development. Creative Touch Imaging Ltd. / NurPhoto via Getty Images Scientists ...

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 ...