Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. It’s becoming increasingly difficult to see stars in the ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

These are the best motion-sensing lights for indoor use. Good indoor lighting ensures your home is safe for someone who is ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

Blue light is all around you. These high-energy light waves emanate from the sun, stream through earth’s atmosphere, and interact with light sensors in your skin and eyes. Increasingly, people are ...