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
Does more sleep mean you are smarter? - Quora
Sleeping: Slowing down memory with less sleep .. Research reveals key facts ..! | Poor Sleep Causes Memory Loss And Forgetfulness .. Research reveals key facts ..! | pipanews.com
Reasons Why People Sleep Less in Summer? - Livpure Sleep Blog
Amy Chua Quote: “As a purely mathematical fact, people who sleep less live more.”
Shut-Eye Deficit: OECD Survey Reveals Japan Most Lacking in Sleep | Nippon.com
56% of us want 8 hours sleep – but only 21% of us get it | YouGov
Do older people really sleep less? Here’s the gist!
Here's Why You Sleep Much Less As You Age | HuffPost Life
Americans are sleeping less than they were 13 years ago | Science News
When people sleep more they also eat less sugar and carbs | New Scientist
Why Do Some People Need Less Sleep? It's in Their DNA - Scientific American
As we age, do we need more sleep or less sleep? - Quora
A second mutation that makes people need less sleep has been found | New Scientist
The worrying effects of working more and sleeping less - BBC Worklife
Amy Chua quote: As a purely mathematical fact, people who sleep less live...
Does Less Sleep Make You Less Healthy?
Are we sleeping less than we used to?
Why do old people sleep less?
Why we sleep less and less? • Texpir
27 Successful People Who Sleep Less — Anne Cohen Writes
As a purely mathematical fact, people who sleep less live more | Picture Quotes
Are we sleeping less than we used to? Here are the facts
