The accelerating expansion of the Universe, first observed in 1998, remains one of the most profound mysteries in modern physics. It challenges long-standing assumptions about the cosmos and has ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. General relativity has withstood perhaps its toughest challenge to date. The theory, which Albert ...

The accelerating expansion of the Universe has puzzled scientists since its discovery in 1998. This phenomenon, one of the ...

If gravitational condensate stars (or gravastars) actually existed, they would look similar to black holes to a distant observer. Two theoretical physicists have now found a new solution to Albert ...

To square Albert Einstein’s General Theory of Relativity with quantum mechanics requires some currently unknown physics, and that’s led some scientists to question if Einstein’s theory could use some ...