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.

Mice also have more triangular snouts compared to the less pointed snouts of rats. Both rodents have long, thin tails, but rat tails are hairless, while mice tails are covered with fur.

Two research teams have demonstrated that adding rat neurons to mouse brains that were missing crucial cells could help the organs to recover function 1, 2. The experiments could help scientists ...

She coordinates with city government agencies, community organizations and the private sector to reduce the city's rat population. City officials are so determined to fight the rat population that ...