The American Heart Association says a preliminary study links higher exposure to artificial light at night with increased ...

And those who experienced peak activity later in the afternoon — from 2:15 p.m. onward — had a 45% higher risk of dementia ...

Blue light has acquired a dubious reputation in recent years, frequently blamed for everything from disrupted sleep patterns to digital eye strain. This high-energy light, emitted abundantly by our ...

Bright outdoor light exposure at night is associated with an increased risk of heart disease, according to an October study published in the Journal of the American Medical Association. Light at night ...

Good sleep hygiene calls for, among other things, a cool, dark and relaxing environment. It turns out the dark part is key to helping prevent heart disease. People who are exposed to more artificial ...

Light could suppress the sleep hormone melatonin. Sleeping with a cellphone, bright alarm clock on or a television next to your bed puts women at risk for weight gain, a new study found. Women who ...

A new study has an important implication for tweens and young teens as they head back to school: Taking a gadget to bed could really hurt their sleep. Enough light exposure at night can keep anyone ...