110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a little more sense ...

A bizarre "cosmic glitch" in the theory of how the gravity of the universe works may have been mended. The strange glitch in Einstein's description of gravity in his theory of general relativity may ...

A South Korean physicist has proposed a theoretical framework that could support the unification of quantum mechanics and the ...

BOULDER- Black holes, time travel and E= mc^2. They are all related to Albert Einstein's Theory of Relativity. How many of us, though, can actually explain any of it? This year, Einstein's theory ...

NPL has shared the results of a time dilation demonstration—which shows that time travels faster as height increases, as predicted by Albert Einstein's theory of general relativity. The demonstration ...

Humans have been studying total solar eclipses for millennia to better understand the cosmos. Total eclipses have helped prove Einstein's theory of relativity and led to the discovery of helium. Here ...

Albert Einstein had described the special theory of relativity in 1905. The result of Einstein's thinking about light, this theory introduced brand-new ideas to science. It opened up an entire field ...

The Trump administration wants to close one of the nation’s two cutting-edge observatories — one of them in the Tri-Cities — that made scientific history and launched a new way to study the universe.

In casual conversation, people often use the word theory to mean "hunch" or "guess": If you forget to put the bread in the breadbox and discover chunks have been taken out of it the next morning, you ...