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.
'Spacetime foam' might just be the wildest thing in the known universe, and we're just starting to understand it.
“The real estate left over for the skeptics of quantum mechanics has shrunk considerably."
Astronomers watched as a star passed within 12 billion miles of the black hole at the center of the Milky Way and reached a speed of 15 million miles per hour.
Meet the 17-year-old desi megamind and newly minted author of 'Weird Maths' who grew up being compared to Einstein.
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.
The Results of a 100,000-Person Quantum Experiment Seem To Violate Einstein’s Theory of Local Realism
The largest participatory experiment in quantum physics is helping physicists better understand the nature of reality by eliminating free will from the equation.
"In some cases, one can live forever in a universe unknown."
Astronomers capture both a gravitational wave and optical imagery from the energetic union of two neutron stars in a distant galaxy.
Rainer Weiss, Kip Thorne, and Barry Barish are named for leading the effort to detect gravitational waves.
Timescape cosmology offers a way around one of the universe's best mysteries.
Typographer Harald Geisler's latest Kickstarter project will let you mail Einstein and Freud's pacifist letters to a friend...or your oppressors.