Avoid This 1 Type of Light to Fight Seasonal Mood Changes, Therapists Say

In TODAY.com's Expert Tip of the Day, a psychiatrist explains why being exposed to a certain type of light at the wrong times ...
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Light exposure during the day linked to a 20% lower risk of depression, new study finds. Here's why.

Avoiding light at night and seeking light during the day may be a simple and effective way to improve mental health. (Getty Images) For years, scientists have spoken about the mental health benefits ...

Photos Show the Northern Lights Illuminating the Sky in Vivid Color Across the U.S. Here’s Where You Could See Them Tonight

Photos show the lights illuminating the sky in vivid color across the U.S. this week. They'll be visible again in some states ...

What are the northern lights? The science behind the aurora borealis.

Nature offers many dazzling displays, from jagged flashes of lightning to radiant sunsets. But perhaps one of the most ...