Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. The grueling Medical College Admission Test, or MCAT, was first ...

Between jobs, school, kids, and other physical and mental tolls on our time and energy, we could all use better, more restful sleep. There’s no question that good shut-eye is important for our health.

Twenty-six years. That is roughly how much of our lives are spent asleep. Scientists have been trying to explain why we spend so much time sleeping since at least the ancient Greeks, but pinning down ...

In 1959, New York DJ Peter Tripp became a test subject for sleep’s effects. His 201-hour wakeathon made him see spiders in his shoes and question his identity. This shows why sleep is essential, not ...

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YouTube is adding a few experimental features including Sleep Timer, Dream Screen, and an AI that answers questions about videos. Sleep Timer, Dream Screen, and the bot are available until September 2 ...