Most explanations rely on "dark energy" to explain the Universe's accelerating expansion rate, but a new study takes a different path.

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 ...

"For the last 20 years, people believed that the cosmological constant is positive, and the universe will expand forever," Tye says. "The new data seem to indicate that the cosmological constant is ...

The new data seem to indicate that the cosmological constant is negative, and that the universe will end in a Big Crunch,” ...

Why is the universe expanding at an ever-increasing rate? This is one of the most exciting yet unresolved questions in modern ...

This graphic offers a glimpse of the history of the Universe, as we currently understand it. The cosmos began expanding with the Big Bang but then around 10 billion years later it strangely began to ...

Scientists have released a new study on the arXiv preprint server that catalogs the universe by mapping huge clusters of ...