Sleep

Watch

• Mysteries of Sleep (2020) | Full Documentary | NOVA ↗PBS America
• The Most Relaxing Mysteries in Our Universe to Fall Asleep To ↗Sleepy Science Channel
• What Did Early Humans ACTUALLY Do All Day? | History for Sleep ↗Sleepy Time Historian
• The ENTIRE Story of Greek Mythology ↗Dreamoria
• Why We Dream - Science Documentary ↗Fire of Learning
• How Did People Sleep in Medieval Castles Without Freezing to Death | 2 Hours of Relaxing History ↗Boring History Secrets

Read

• Why We Sleep: Unlocking the Power of Sleep and Dreams ↗A compelling and comprehensive exposé on the vital, often underestimated, role of sleep in human health and cognitive function, urging a societal re-evaluation of its priority.Matthew Walker
• The Promise of Sleep: A Pioneer in Sleep Medicine Explores the Vital Connection Between Health, Happiness, and a Good Night's Sleep ↗From a titan of sleep research, this seminal work offers a foundational understanding of sleep's mechanisms and its profound implications for well-being, predating much contemporary discourse.William C. Dement
• Dreamland: Adventures in the Strange Science of Sleep ↗An engaging journalistic journey through the peculiar history and cutting-edge science of sleep, making complex concepts accessible to the curious novice.David K. Randall
• Regularly occurring periods of eye motility, and concomitant phenomena, during sleepThe foundational scientific observation that first described REM sleep, a discovery that fundamentally reshaped our understanding of the sleeping brain.Eugene Aserinsky and Nathaniel Kleitman
• Internal Time: Chronotypes, Social Jet Lag, and Why You're So Tired ↗A rigorous exploration of circadian rhythms and individual chronotypes, illuminating how modern life often clashes with our innate biological clocks, leading to widespread 'social jet lag.'Till Roenneberg

Voices to follow

• Matthew Walker ↗His best-selling book, 'Why We Sleep,' has become a seminal text, popularising the critical importance of sleep for health and cognition.Professor of Neuroscience and Psychology, University of California, Berkeley; Founder and Director of the Center for Human Sleep Science
• Michael Grandner ↗A leading researcher focusing on the intersection of sleep, health behaviours, and chronic disease, offering practical, evidence-based insights.Director, Sleep and Health Research Program, University of Arizona; Associate Professor of Psychiatry

Glossary

• Circadian RhythmThis is your body's natural 24-hour internal clock that tells you when to be awake and when to be sleepy. It's why you usually feel tired around the same time each night. For example, your circadian rhythm makes you feel sleepy when it gets dark outside and more alert when the sun comes up.
• DreamsDreams are stories and images your mind creates while you're asleep, especially during REM sleep. They can feel very real, strange, or even confusing. For example, you might dream you're flying or that you're late for school, even though you're safely in bed.
• InsomniaInsomnia is a sleep disorder where a person has trouble falling asleep, staying asleep, or gets very poor quality sleep. This can make you feel tired and grumpy the next day. For example, if you often lie awake for hours trying to sleep or wake up many times during the night, you might be experiencing insomnia.
• MelatoninMelatonin is a natural hormone your brain makes that helps control your sleep-wake cycle. Your body usually produces more of it when it gets dark, making you feel sleepy. For example, if you stay up late looking at screens, the bright light can stop your body from making enough melatonin, making it harder to fall asleep.
• Non-REM SleepNon-REM sleep is the deeper, more physically restorative part of your sleep cycle, divided into three stages from light to very deep sleep. During this time, your body repairs itself and grows. For example, when you're in deep Non-REM sleep, it's harder to wake you up, and your body is doing most of its physical recovery.
• REM SleepREM stands for Rapid Eye Movement, and it's a stage of sleep where your brain is very active, your eyes move quickly, and most of your vivid dreams happen. This stage is important for learning and memory. For example, if you wake up during REM sleep, you might remember a dream very clearly.
• SleepSleep is a natural resting state where your body and mind slow down to repair and recharge. It's super important for your health, mood, and ability to learn. For example, after a long day of school and sports, your body needs sleep to recover and be ready for the next day.
• Sleep CycleA sleep cycle is a journey your body takes through different stages of sleep, lasting about 90 minutes each. You go through several of these cycles every night. For example, during a typical night, you might complete 4-6 sleep cycles, moving between lighter and deeper sleep stages.
• Sleep DebtSleep debt is the difference between the amount of sleep you need and the amount you actually get. If you consistently sleep less than you should, you build up "debt" that makes you feel tired. For example, if you need 8 hours of sleep but only get 6 for a few nights, you're building up sleep debt, which makes you feel extra sleepy on the weekend.
• Sleep HygieneSleep hygiene refers to the healthy habits and practices you follow to get good quality sleep regularly. It includes things like having a consistent bedtime and a dark, quiet room. For example, practicing good sleep hygiene means avoiding caffeine before bed and making sure your bedroom is cool and comfortable.

Threads 7

Where this connects to other fields, and why it's worth knowing.

• Waste, Reuse & Material Loops Environment

  Every organ but the brain has drainage pipes to wash out its trash. The brain has none, so it can only rinse away its daily gunk, including the sludge tied to Alzheimer's, during deep sleep, when channels open and fluid floods through. It's a self-cleaning machine that only cleans while switched off.

• Earth & Planetary Science Science

  Almost every cell in your body runs a tiny clock set to roughly 24 hours, tuned to Earth spinning once a day. Fly across the planet or work the night shift and you're forcing your biology to fight the rotation of the world. Jet lag is literally your cells arguing with the spin of the Earth.

• Growth & Productivity Economics

  Stay awake all night and your brain works about as badly as if you were legally drunk, slow, foggy, and making dumb calls. Now multiply that across millions of tired workers making mistakes every day. All that lost sleep quietly drains a country's output more than most fancy economic policies could ever add back. Sleep is national wealth we throw away.

• Film & the Moving Image Arts & Design

  Movies constantly cut between places, jump forward in time, and dissolve one scene into another, and we barely blink. Why does that feel normal? Because your dreaming brain already edits exactly like that every night in REM sleep. Film's weird grammar feels natural because we've been watching our own dreams do it forever.

• The Industrial Revolution History

  For most of history the sun told people when to wake and sleep. Then factories installed whistles and clocks, and suddenly a machine decided your schedule, sunlight be damned. We're still fighting that fight: your body's natural rhythm and the alarm clock are locked in a battle the Industrial Revolution started.

• Social Media and Attention Media

  Endless scrolling at night steals the sleep your brain needs to build self-control. But without that self-control, you're even worse at resisting the scroll tomorrow. Feed and tired brain feed each other, night after night.

• Student Mental Health Education

  You pull an all-nighter to ace the test. But deep sleep is exactly when your brain files away what you studied. So skipping sleep to chase the grade quietly erases the very learning the grade is supposed to measure.