After examining 13 million hours of light exposure data, researchers found that experiencing bright light during the dark hours can significantly increase the risk of heart failure and heart attack.

As the sun goes down, we switch on the lights indoors, from overhead to lamp lights. At the same time, bright lights from the street illuminate homes. Screens add to these lights, from television to ...

Every day, as sunlight streams into your eyes, trillions of tiny clocks in your cells reset. The human body uses light to correctly time myriad processes, ensuring that liver enzymes are made on ...

Sleeping in complete darkness may improve heart health and lower cardiovascular disease risk, according to research. Here’s ...

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 ...