Elemental
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Elemental

Light at Night Spoils Sleep and Health

You won’t realize it’s happening, but even moderate light robs you of deep sleep and raises your heart rate

Photo: Unsplash / Shane

Once upon a time, humans slept in total darkness, save perhaps some bright moonlight or a soothing fire at the cave entrance. After millions of years without light switches, we’re evolutionarily programmed to rely on…

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Robert Roy Britt

Robert Roy Britt

Health & science writer. Independent journalist covering physical health & mental wellness. My new book, “Make Sleep Your Superpower,” is coming Nov. 1.