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Why Do Some People Need Less Sleep? It's in Their DNA - Scientific American
If I do nothing for a day, I need a lot of sleep to feel rested, but if I am active, I only need a small amount of sleep. Why? - Quora
Older Americans: Sleep "Doze" a Body Good
Are we sleeping less than we used to? Here are the facts
Why some people need less sleep than others | RNZ
Why Do Some People Need Less Sleep Than Others? | Live Science
A way to sleep less and still be energetic : r/lifehacks
Can I train my body to sleep less?
Are we sleeping less than we used to? Here are the facts
Do older people really sleep less? Here’s the gist!
Less Sleep, Less Friends » the nerve blog | Blog Archive | Boston University
As a purely mathematical fact, people who sleep less live more | Picture Quotes
How (not) to build a successful and sustainable life in science Part I: Sleep Pascal Wallisch. - ppt download
Does Less Sleep Make You Less Healthy?
Why do old people sleep less?
Research results that people living in places with lots of nature and parks are less likely to lack sleep - GIGAZINE
Why Sleep Less?. Introduction and Background | by Luis Corrales | Medium
Does more sleep mean you are smarter? - Quora
Are we sleeping less than we used to?
Is Sleeping Less the Key to Professional Success?
Here's Why You Sleep Much Less As You Age | HuffPost Life
The worrying effects of working more and sleeping less - BBC Worklife
So, why do some people need such little sleep? | The Independent | The Independent
