Snooze Alarm: Sufficient Sleep Improves Human Health and Longevity https://www.seeker.com/health/snooze-... “‘Getting less than 7 hours of sleep per night on average reduces lifespan,’ Adam Krause, co-author of the study and a graduate student at the University of California, Berkeley, told Seeker.”
Trouble Sleeping? Restless Nights Evolved From Ancestors Avoiding Dangers https://www.seeker.com/culture/behavi... “If you’re one of the many people who sometimes has difficulty staying asleep, you’ll be interested to learn that the root cause may be at least partly prehistoric. A new hypothesis, based on research concerning modern hunter-gatherers, suggests that humans evolved to be somewhat vigilant at night in order to avoid predators and other threats.”
Effects of blue light on the circadian system and eye physiology https://www.ncbi.nlm.nih.gov/pmc/arti... “LEDs are used in TVs, computers, smart phones, and tablets. Although the light emitted by most LEDs appears white, LEDs have peak emission in the blue light range (400–490 nm). The accumulating experimental evidence has indicated that exposure to blue light can affect many physiologic functions, and it can be used to treat circadian and sleep dysfunctions.”
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