Dark energy, the mysterious force driving the accelerated expansion of the universe, has puzzled scientists since its ...

For more than two decades, the standard model of cosmology has stood as a reliable guide to the universe. Known as Lambda ...

Modern cosmology has precisely measured the universe's properties, yet dark matter and dark energy remain profound mysteries.

One of the big mysteries of the universe is how it's expanding. The phenomenon causing that expansion is known as dark energy — and recently, scientists have started to wonder if its changing.

A new interpretation of dark energy data suggests that the mysterious force, which accelerated the early universe's expansion ...

Cosmologists have found signs that a second type of dark energy — the ubiquitous but enigmatic substance that is pushing the current Universe’s expansion to accelerate — might have existed ...

Enigmatic dark energy, thought to make up 68% of the universe, may not exist at all, according to a Hungarian-American team. The researchers believe that standard models of the universe fail to ...

The theory breaks with the popular idea that expansion is caused by dark energy and suggests energy for expansion would never run out.

In an expanding Universe — like the one we live in — it isn't simply curvature that's determined by matter-and-energy, but how the expansion rate changes over time.