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Why Humans Are Supposed to Sleep in Two 4-Hour Phases
Sleeping twice a day
Trying Biphasic Sleep for 2 Months, See Why It Improved My Day
What Do Scientists Really Know About Polyphasic Sleep?
Are naps actually good for us? | Sleeping with Science
Sleeping twice a day changed my life
Sleeping Twice A Day Is Better For You
Best and Worst Times to Sleep
What is Biphasic Sleep | Explained in 2 min
Split Schedule Sleeping
Why Getting the 8th Hour of Sleep Matters
How much sleep do you really need? | Sleeping with Science, a TED series
