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Research published in the Journal of Neuroscience Tuesday claims that chronic sleep loss can lead to a permanent loss of brain cells - nullifying any hope to "make up" for lost sleep.

Despite a wealth of research, we still don't know the purpose of sleep. A new animal study suggests one possible function: to promote the repair of support structures in the brain

Learn about famous psychologists and explore different types of psychology, including behavioral, cognitive, and clinical, through this Education Portal course. Designed to prepare you to earn real college credit by passing the Psychology CLEP and Psychology Excelsior exams, this course features video lessons ranging in topic from the importance of psychology to operant conditioning and from memory distortion to reasons we sleep and dream. Our psychology instructors are experienced and knowledgeable educators, and they've designed the videos for this course to be brief yet comprehensive and entertaining. You'll also have access to self-assessment quizzes, which will allow you to gauge how much you've learned.

A US study has raised the possibility that we may one day rely on caffeine to boost memory as well as to wake up.

Scientists believe they have figured out why it takes us so long to adapt when we travel to new time zones.