A company called Reflect Orbital wants to illuminate the Earth after sunset with orbital sky mirrors, raising alarm bells.

In the first study of its kind, neuroscientists have shown the real-world benefits that sunlight gives the brain, beyond ...

Problem is, smartphones and tablets emit “blue light,” which can suppress these natural hormones that promote sleep. Blue ...

In the late 19th century, the Mosin-Nagant was a top-of-the-line rifle, but times have changed. The infantry version of the ...