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

Physicists have long treated space and time as the stage on which quantum particles perform, not as actors in the drama ...

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

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

Physicists are quietly testing an audacious idea: that the mass of everything around us might not come from an invisible ...

The theorized unseen structure of spacetime could also explain of the outstanding questions about the accelerating expansion ...

Lorentzian geometry forms the mathematical cornerstone of modern spacetime theory by providing a framework in which the causal structure and metric properties of the universe can be rigorously ...

When speaking of our universe, it's often said that "matter tells spacetime how to curve, and curved spacetime tells matter how to move." This is the essence of Albert Einstein's famous general theory ...