Astronomers have discovered a gamma-ray burst with X-ray activity detected 27 days after the initial explosion, setting a new ...

Dark energy remains among the greatest puzzles in our understanding of the cosmos. In the standard model of cosmology called the Lambda-CDM, it is accounted for by adding a cosmological constant term ...

Mathematicians have uncovered what they argue is a fundamental flaw in the standard model of the universe, potentially challenging the need for dark energy. Their calculations suggest that the ...

The analysis showed that if one assumes that dark matter has a very small pressure during cosmic expansion, so that its ...

Add Yahoo as a preferred source to see more of our stories on Google. A cosmic glitch in gravity may make gravity about 1% weaker across billions of light-years, challenging Einstein's theory at vast ...

The KM3NeT collaboration is a large research group involved in the operation of a neutrino telescope network in the deep Mediterranean Sea, with the aim of detecting high-energy neutrino events. These ...

The cosmic microwave background is the faint residual light from the very beginnings of the universe. It’s often referred to as the afterglow of the Big Bang. At over 13 billion years old, it is the ...

・Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity appearing about 1 percent weaker on cosmic scales. ・The proposed “cosmic glitch” ...

Gravity has passed nearly every test physicists have thrown at it for a century. Yet on the largest scales in the universe, a small mismatch may be pointing toward a limit in Einstein’s theory. A team ...