We have all heard the jokes about grandparents waking up before the sun and teenagers sleeping until noon, but science confirms there is truth to the stereotypes. The timing of our sleep is not purely ...

As you get older, it's normal to notice changes in your sleep. These can include fewer hours of shuteye, waking up more during the night, and finding it harder to drop off. However, despite the ...

“Sorrow can be alleviated by good sleep, a bath, and a glass of wine.” —Thomas Aquinas Getting enough restful sleep is not a basic luxury, it is a biologic necessity. Sleep is far more than about ...

New research shows that poor sleep could make the brain appear years older than it really is. Using MRI scans and machine learning, scientists found a clear link between unhealthy sleep patterns and ...

An analysis of biological clocks throughout the human body suggests that too few hours of sleep—and too many—may speed aging in the brain, heart, lung, and immune system and is associated with a wide ...

Mark Gurarie is a writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of Medical and ...

Tracking 42,759 menstrual cycles with wearable devices, researchers uncovered how sleep patterns, age, and physiology intertwine, revealing that even modest sleep disruptions may be linked to ...

Fri, May 15, 2026 at 6:07 PM UTC According to the National Institutes of Health, quality sleep is as essential for our survival as food and water. But how much sleep is optimum? New research suggests ...

The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced. By Clarissa Brincat Published Sep 9, 2025 9:00 AM EDT Add Popular Science (opens in a new ...