For over a century, scientists have thought of time as a fundamental property of the universe. But the more researchers seek ...

A curious question sparked a cosmic deep dive into why light never tires—even after 25 million years on the move. Reading time 4 minutes My telescope, set up for astrophotography in my light-polluted ...

The interaction of light with objects and media moving at relativistic and superluminal speeds enables unconventional phenomena such as Fresnel drag, Hawking radiation, and light amplification.

In a groundbreaking new study, researchers from the University of Rostock and the University of Birmingham have made a surprising discovery that challenges the long-held understanding of time and ...

Time crystals are unexpected states of matter that spontaneously break time-translation symmetry either in a discrete or continuous manner. However, spatially mesoscale space-time crystals that break ...

Here’s what you’ll learn in this story: Time might actually have 3 dimensions. But it also means that the space would actually be one-dimensional, instead of the three dimensions we’re familiar with.

Supermassive cosmic objects, such as black holes, are very difficult to study directly, but researchers can construct useful analogues in the laboratory using quantum effects. For example, researchers ...

Photonic space-time crystals are materials that could increase the performance and efficiency of wireless communication or laser technologies. They feature a periodic arrangement of special materials ...

Researchers have developed a blueprint for weaving hopfions—complex, knot-like light structures—into repeating spacetime crystals. By exploiting two-color beams, they can generate ordered chains and ...