Sunlight on Earth changes over decades, affecting climate, agriculture, and energy production, including solar power.

The sun rises each day, but the amount of sunlight reaching Earth’s surface is not as constant as we might think. A new study ...

Moderate amounts of sunlight before waking up can have a positive effect. News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.

Ultraviolet (UV) light can severely damage the eyes, contributing to conditions such as cataracts, photokeratitis, and ...

Sleep is a necessary part of people's daily routine, but modern lifestyles and technology have ushered in an era of decreased ...