You spend a third of your life sleeping — about 25 years if you live to 75. But what really happens during tho! Swipe to see →
Your brain is more active during REM sleep than when you're awake. Sleeping poorly for a single night reduces your cognitive capacity by ...
Alarming fact: after 24 hours without sleep, your cognitive function is equivalent to being legally drunk (0.10% blood alcohol).
Each night, you go through 4-6 sleep cycles, each lasting 90-110 minutes. Each cycle has distinct phases with specific functions.
During deep sleep, the glymphatic system (discovered in 2012) "washes" the brain, removing metabolic waste including beta-amyloid — the p...
You dream every night — even if you don't remember. On average, a person has 4-6 dreams per night, totaling about 2 hours of dreaming. Ov...
1. Does it take you more than 20 minutes to fall asleep?
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