Sometimes when birds and mammals are asleep and (presumably) dreaming, the eyes twitch rapidly and wildly. Now, researchers studying the brains of sleeping bearded dragons reveal that reptiles share ...

"I have to get my deep REM sleep," expresses a common confusion about two very different types of sleep. Deep sleep and rapid eye movement (REM) sleep are not the same; they do not even overlap. They ...

Most creatures sleep, but until now, REM (rapid eye movement) sleep, the phase of sleep in which dreams occur, was thought to be exclusive to vertebrates. Octopuses appear to be the first ...

REM sleep goes even deeper into brain recovery, dreaming and processing memories and emotions. This is the sleep stage in ...

Each morning, your brain embarks on a remarkable series of events: it transitions from being asleep, potentially in an alternate reality, to waking up. Within a short time, you regain waking ...

Scientists have long believed vertebrates to be the only creatures capable of experiencing rapid eye movement (REM) sleep, the stage in which we most often tend to dream. But as with other cognitive ...