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 ...

Scientists have published nearly the entire genome of the common rat, making it possible to compare it to the genetic maps of people and mice. That ability is expected to yield clues into evolution ...

Our sensory urges ranging from anger to hunger are regulated by hormonal or neuronal signals. Often, these impulses appear as behavioral responses, evoked through complex biological reactions.