Too much REM sleep: why do depressed people wake up exhausted? | Human Givens
The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg
How to Get More REM Sleep
REM Sleep Disorder
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How much sleep do you really need? | Sleeping with Science, a TED series
Meditation Sleep Music for Deep Sleep, Stop Overthinking - Calm Down, End Anxiety Attacks
What's REM Sleep - How Much Do You Need?
The surprising health benefits of dreaming | Sleeping with Science
The Danger of Sleeping Too Much
Why you're still tired after getting 8 hours of sleep
Are you Getting Enough Deep Sleep?
What causes insomnia? - Dan Kwartler
2-Minute Neuroscience: Stages of Sleep
How Some People Can Sleep Through Anything
"Get Quality and Sufficiently Long Deep Sleep" by Dr. Andrew Huberman
Insomnia: why can't I sleep?
2-Minute Neuroscience: Sleep Paralysis
Are naps actually good for us? | Sleeping with Science
Dr. Matt Walker: The Science & Practice of Perfecting Your Sleep