Sleep

A recent imaging study reveals that fluid from the brain drains directly into the spongy bone marrow of the human skull. This newly mapped biological pathway appears to influence sleep quality, systemic inflammation, and cognitive performance.

Researchers recently investigated the pathways connecting caffeine use disorder, depression, and sleep quality. Their findings illustrate how problematic caffeine consumption and specific use motives correlate with impaired sleep and mental health outcomes.

A happy marriage usually promotes a longer life, but a new study shows this benefit depends heavily on shared habits. When partners bond over poor diets and bad sleep, their relationship satisfaction might actually accelerate their biological aging.

A sleepless night severely impairs your ability to form new memories. But a recent study shows that a 20-minute workout or a 90-minute nap can both protect memory after sleep loss, using completely different brain mechanisms.

A new study tracks how daily stress and bedtime worry impact sleep. Researchers found that racing thoughts predict nighttime wakefulness, especially for individuals with high sleep reactivity, while physical symptoms like elevated heart rate play a smaller role.

New research explores how our personalities influence the way we cope with nightmares. The study reveals that extroverts prefer to talk about their bad dreams, while other traits are linked to unique strategies like rewriting dream endings.

A new study reveals that during REM sleep, the brain uses repeating chains of rapid electrical waves to replay and organize memories. The findings highlight how different sleep stages work together to store our daily experiences.

For adults who struggle to stay asleep, a bed that sways gently throughout the night might offer a path to better rest. New research reveals that continuous rocking reduces nighttime awakenings in people with insomnia symptoms.

Analyzing data from over 485,000 people, researchers found that habitual consumers of four or more caffeinated drinks sleep slightly less. Surprisingly, this shorter sleep features increased depth, suggesting our bodies adapt to chronic caffeine intake.

Taking a long time to fall asleep during pregnancy is associated with slightly lower offspring intelligence scores at age four. New research points to specific metabolic chemicals in the blood that may link prenatal rest to child brain development.

A new study using artificial intelligence to analyze street-level images finds that visually enclosed neighborhoods—framed by trees and buildings—are linked to longer sleep and less insomnia, likely because these areas feel safer and more lively.

New parents expect to lose sleep, but a new longitudinal study reveals that early postpartum depression and anxiety can predict worse perceived sleep quality months later, creating a cycle of distress for both mothers and fathers.

Women experiencing physical symptoms of stress, like headaches or muscle pain, report more negative dreams. A new psychological survey explores how daytime physical discomfort and general bodily awareness relate to the emotional intensity of our nighttime narratives.

Exposure to natural sunlight early in the day is associated with an earlier sleep schedule and better overall rest. A recent survey of adults in Brazil highlights how morning light helps synchronize the human biological clock.

A recent study found that during REM sleep, the brain receives a surge of blood and nutrients, yet energy levels inside neurons actually drop. This “energy paradox” suggests the sleeping brain dynamically reorganizes its metabolic resources.