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Why Do We Dream? The Science of Dreaming Explained

We dream primarily during REM (rapid eye movement) sleep, when the brain becomes highly active while the body is temporarily paralyzed. Science doesn’t have one definitive answer for why we dream, but the leading evidence-based theories suggest dreams serve several overlapping functions: processing and regulating emotions, consolidating memories and integrating new information, simulating threats and

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Sleeping Pills and Sleep Medications: A Plain-Language Guide

Sleep medications range from over-the-counter options (melatonin, antihistamines) to prescription hypnotics (such as “z-drugs” and benzodiazepines) and other prescription medications used for sleep. They can be genuinely useful for short-term or situational insomnia, but they share important limitations: most treat the symptom (being unable to sleep) rather than the underlying cause, many carry risks of

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What’s the Best Sleep Position? Side, Back, and Stomach Compared

For most people, side sleeping is the best overall position — it keeps the airway open (reducing snoring and sleep apnea), supports the spine when done with proper pillow support, may aid the brain’s glymphatic waste clearance, and is recommended in pregnancy. Back sleeping is good for spinal alignment and pressure distribution but worsens snoring

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Sleep and Aging: How Sleep Changes as You Get Older (and What Helps)

Sleep changes with age, but the common belief that “older people need less sleep” is a myth. Adults over 65 still need around 7–8 hours — they simply find it harder to get. With age, sleep becomes lighter and more fragmented, deep sleep declines significantly, the circadian rhythm shifts earlier (causing earlier bedtimes and early-morning

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Sleep and the Immune System: How Sleep Protects Your Health

Sleep and the immune system are deeply connected, and the relationship runs both ways. During sleep — especially deep sleep — your immune system performs critical functions: producing and releasing protective proteins (cytokines), strengthening immune memory, and optimizing the response to threats. Poor or insufficient sleep measurably weakens immune defenses: research shows that people sleeping

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What’s the Best Temperature for Sleep? The Science of a Cool Bedroom

The best bedroom temperature for sleep is around 18–19°C (65–67°F) for most adults. This cool range supports the natural drop in core body temperature that initiates and maintains sleep. Individual preferences vary — some people do best slightly cooler (around 16°C/60°F) and others slightly warmer (up to about 20°C/68°F) — but a room that’s too

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