The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg
Too much REM sleep: why do depressed people wake up exhausted? | Human Givens
How Some People Can Sleep Through Anything
How to Get More REM Sleep
How much sleep do you really need? | Sleeping with Science, a TED series
What happens when we sleep?
Why you're still tired after getting 8 hours of sleep
The Danger of Sleeping Too Much
What causes insomnia? - Dan Kwartler
Are naps actually good for us? | Sleeping with Science
REM Sleep Disorder
The surprising health benefits of dreaming | Sleeping with Science
Dr. Matt Walker: The Science & Practice of Perfecting Your Sleep
5 Tips For Deep Sleep
Mayo Clinic Minute: What are the stages of sleep?
What Happens To Your Body And Brain If You Don't Get Sleep | The Human Body
Are You Sleeping Too Much?
How to Get More Deep Sleep!
Insomnia: why can't I sleep?
2-Minute Neuroscience: Sleep Paralysis