How many hours of sleep did you get last night? If you woke up feeling slightly less than refreshed, join the club: The Centers for Disease Control reports that more than a third of American adults don't get enough sleep.
But as scientists are discovering, chronic under-sleeping can cost you big in the long run. Sleep doesn't just contribute to vitality, it "resets" your brain — and poor sleep has even been linked to Alzheimer's disease and other forms of dementia.
MPR News host Kerri Miller ran down the latest in sleep science with Dr. Yo-El Ju, an assistant professor of neurology at Washington University in St. Louis, and Matthew Walker, a professor of neuroscience and psychology at UC Berkeley, and director of UC Berkeley's Center for Human Sleep Science. Walker's new book is titled "Why We Sleep."
Use the audio player above to hear the full segment.