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Learn about Sleep Science — Simply Explained
Sleep is when your brain performs critical maintenance — consolidating memories, clearing waste products, and rebalancing hormones. You cycle through four stages roughly every 90 minutes, including deep sleep (physical repair) and REM sleep (dreaming, learning). Missing even one hour has measurable effects on cognition and health.
Want to truly understand Sleep Science?
Relatable uses AI-powered personas to explain Sleep Science using analogies from your everyday life. Pick a style that clicks with you — from a Gen Z Teen to a Medieval Knight.
Try it in RelatableFrequently Asked Questions
How much sleep do I actually need?+
Most adults need 7–9 hours. Teenagers need 8–10, and children need even more. The myth of thriving on 5 hours is dangerous — less than 1% of people have the gene that allows this.
What is REM sleep?+
REM (Rapid Eye Movement) sleep is when most dreaming occurs. Your brain is highly active, processing emotions and consolidating learning. It makes up about 20–25% of total sleep time.
Why is blue light bad for sleep?+
Blue light from screens suppresses melatonin (the sleep hormone) by mimicking daylight. Your brain thinks it’s still daytime, making it harder to fall asleep. Try reducing screen time 1–2 hours before bed.
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