The ability to detect gravitational waves is rapidly propelling us into a new era of both astronomy and physics. New instruments like the Laser Interferometer Gravitational-Wave Observatory (LIGO) ...

Albert Einstein can rest a little easier: The first effort to measure how quickly gravity exerts its influence indicates that it more or less matches the speed of light, scientists reported Tuesday.

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. There are two fundamental classes of theories required to describe the ...

If the Sun were to spontaneously cease emitting light, we wouldn't know about it for about 8 minutes and 20 seconds. The light that's arriving here on Earth, right at this very moment, was emitted ...