For decades, scientists have believed that the Universe is expanding at an ever-accelerating pace due to a mysterious force ...

Dark energy is one of the greatest mysteries of the universe. This mysterious force is thought to be accelerating the expansion of the cosmos. But a new study challenges this long-held belief. A team ...

A new study is implying that the universe may actually be slowing down and that the culmination of the decrease in dark ...

Physicists have recently proposed a radical idea that challenges our understanding of the universe. They suggest that ...

Evidence suggests the universe’s expansion has started to slow, not accelerate. The results imply dark energy is weakening and evolving faster than previously believed.

Although some compelling evidence exists to support the idea that a repulsive force similar to dark energy exists, it has yet to be directly observed or measured. To circumvent this uncomfortable ...

New strategies may soon allow scientists to test dark energy theories within our own solar system, linking cosmic-scale physics to local observation. Science advances through a cycle of proposing ...

Astronomers may have misread cosmic acceleration for 27 years. The universe may be slowing down, not speeding up.

Our current cosmological model—known as lambda cold dark matter, or ΛCDM—relies on hypothesized dark energy to explain the accelerating expansion of the universe. However, one competing theory known ...

Science is a story of coming up with theories then doing our best to disprove them. That is especially true for theories on a grand, cosmological scale, though disproving them can be particularly hard ...

Last year, we reported on an exciting hint of new physics in the first data analysis results from the Dark Energy Spectroscopic Instrument (DESI)—namely that the dark energy, rather than being ...