Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New ...

Evidence supporting this theory includes the cosmic microwave background, a faint "echo" of the universe's early expansion that scientists can study in detail. While the Big Bang Theory is widely ...

The universe expands...through what? Experts might have a suggestion. Expansion may be happening at a faster rate than ...

It was a beautiful new theory. But the math and observations from the universe wouldn't cooperate. The standard model predicts that the modern universe should be expanding at a rate of 67.4 ...

Could time itself actually explain our universe's expansion? Our current cosmological model—known as lambda cold dark matter, ...

The universe still is expanding and cooling, leaving fossil evidence from what happened as the universe expanded. These fossils are the evidence that our universe really is evolving. Yet the theory of ...

The accelerating expansion of the Universe, first observed in 1998, remains one of the most profound mysteries in modern ...

The expansion of the Universe is not constant. Recent measurements have shown that the rate of the Universe's expansion is increasing. The evidence for this area of physics comes from observations ...

The multiverse theory, a mind-bending concept, proposes that our universe is not alone. Instead, it suggests a vast sea of universes, each with its own ...

"The Hubble tension is now a Hubble crisis." The mystery of the Hubble tension has deepened with the startling finding that ...

New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead ...