All the screens we look at every day emit a large quantity of blue light. That's fine for daytime use, but it can disrupt your sleep at night. That's because blue light stimulates your brain and fools ...

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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.

The rate of human-produced light is increasing in the night sky by as much as 10% per year, making it difficult for astronomers to study the night sky. When you purchase through links on our site, we ...

Remember when you could walk confidently through a dimly lit room without bumping into furniture? Or drive at night without being temporarily blinded by oncoming headlights? If these situations have ...