How many hours of sleep a night do I need?

How much sleep do you really need? | Sleeping with Science, a TED series

How To Survive A Day On No Sleep

Do You Really Need 8 Hours of Sleep Every Night? | Body Stuff with Dr. Jen Gunter | TED

Why you're still tired after getting 8 hours of sleep

I Can't Sleep for More Than 4 Hours a Night - Why? | This Morning

How many hours of sleep do you need?

Why 4 Hours Of Sleep Is Terrible For You — Even If You Don't Feel Tired

Giraffes Sleep Only 30 Minutes a Day! 🦒

How to Sleep Less and Get More Out of Your Day- Thomas DeLauer

How To Take The Ideal Nap And Avoid Bad Sleep

What happens when we sleep?

Can You Sleep Too Much? (The Answer Might Surprise You)

The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg

How lack of sleep affects health and tips for a good night's rest

What Happens If You ONLY SLEEP 4 Hours A Night for 30 Days?

Best Time of Day To Eat, Sleep And Exercise According To Ayurveda | Plan Your Dailly Routine

Pulling an All-Nighter vs. 2 Hours of Sleep: Which is Worse? – Healthy Living and Diet Tips–SELF

How To Fix Your Sleep Schedule - Reset Your Sleep Pattern (animated)

Best and Worst Times to Sleep