Scientists were able to measure time dilation at a distance of just a millimeter, about the width of a pencil tip.
The detection confirms a key prediction of Einstein's theory of general relativity.
The Event Horizon Telescope has taken the best images yet of a radiant jet shooting out of the nearest active galaxy to the Milky Way.
A wave signal from space validates Hawking’s prediction that the area of an event horizon should never decrease.
“Agents could have free choice to make any action they wanted and no paradox would arise because the events just adjust themselves to remain consistent," said study author Germain Tobar.
In yet another win for Albert Einstein’s theories, scientists report the first ever detection of “Schwarzschild precession” around a black hole.
Astronomers spent 20 years using a dead star as a gigantic "cosmic clock" to test a mind-blowing prediction of Einstein's general theory of relativity.
A foundational thought experiment in Einstein’s theory of general relativity just got its most precise confirmation ever by turning the entire Earth into a laboratory.
LIGO's detection of gravitational waves was an achievement comparable to Galileo’s telescope. Meet the man whose team built the detector.
A controversial theory that would overturn Einstein’s theory of general relativity could soon be tested.