The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

As new and powerful telescopes gather fresh data about the universe, they reveal the limits of older theories like Einstein's relativity. When you purchase through links on our site, we may earn an ...

Bridging the quantum world to relativity Einstein spent the rest of his life, without success, pursuing ways to integrate his theory of general relativity with quantum mechanics. While it is tempting ...

In November 1915, Albert Einstein put the finishing touches on his radical reinvention of space, time, gravity and the Universe itself. Throughout the following 100 years, experimenters have confirmed ...

This artist's illustration depicts how the foamy structure of space-time may appear, showing tiny bubbles quadrillions of times smaller than the nucleus of an atom that are constantly fluctuating and ...