The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

Researchers in Germany argue that a modified theory of gravity could explain universal expansion, removing dark energy from ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

For a quarter century, cosmology has rested on a simple but audacious idea: that a fixed “cosmological constant” drives the ...

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 ...

The universe’s accelerating expansion has long puzzled physicists. For decades, dark energy, an unseen force thought to make ...

Scientists propose a new gravity theory using Friedmann equations. Their model explains the universe’s accelerating expansion ...

Forget one Big Bang — try many. A bold new theory pokes holes in the popular origin story, suggesting the universe evolves through a series of lightning-fast bursts, rewriting what we know about ...

Why the universe is expanding faster and faster remains one of the biggest open questions in physics. Current theories cannot ...

Studies suggest that the universe's expansion is decelerating — but what could that mean for the future of the cosmos?

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 ...