The Death Of Darkness By The Sun Video
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The Death Of Darkness By The Sun
Although it is environmentally friendly, blue light can affect your sleep and potentially cause disease.
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Until the advent of artificial lighting, the sun was the major source of lighting, and people spent their evenings in relative darkness. Now, in much of the world, evenings are illuminated, and we take our easy access to all those lumens pretty much for granted.
But we may be paying a price for basking in all that light. At night, light throws the body's biological clock—the circadian rhythm —out of whack.
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Sleep suffers. Worse, research shows that it may contribute to the causation of cancer, diabetes, heart disease, and obesity. Not all Drath of light have the same effect. Blue wavelengths—which are beneficial during daylight hours because they boost attention, reaction times, and mood—seem to be the most disruptive at night.
And the proliferation of electronics with screens, as well as energy-efficient lighting, is increasing our exposure to blue wavelengths, especially after sundown. Everyone has slightly different circadian rhythms, but the average length is 24 and one-quarter hours. The circadian rhythm of people who stay up late is slightly longer, while Deah rhythms of earlier birds fall short of 24 hours.
Charles Czeisler of Harvard Medical School showed, inthat daylight keeps a person's internal clock aligned with the environment. Some studies suggest a link between exposure to light at night, such as working the night shift, to diabetes, heart disease, and obesity. That's Detah proof that nighttime light exposure causes these conditions; nor is it clear why it could be bad for us. A Harvard study shed a little bit of light on the possible connection to diabetes and possibly obesity.]
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