Pushing the limits of structured light, applied physicists report a new type of optical vortex beam that not only twists as it travels but also changes in different parts at different rates to create ...

The sun may rise every morning, but the amount of sunlight reaching Earth's surface can substantially vary over decades, according to a perspective article led by an international research team.

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

Researchers tested whether introducing light into the bedroom before waking would improve morning wakefulness and found an amount of time that seems to help fight off fatigue and raise alertness most.

We’ve wondered what powered the Sun for centuries. Early guesses included meteor showers, chemical combustion, and ...