How do we know the speed of light – and why does it have a speed limit at all? Leah Crane explores the history of one of the ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. There are two fundamental classes of theories required to describe the ...

Using ultra-fast laser pulses and special cameras, scientists have simulated an optical illusion that appears to defy Einstein's theory of special relativity. One consequence of special relativity is ...

We wouldn’t notice. Or we’d die. Depends on how much it changed. Relativity already tells us what would happen if the speed of light were to change, and the answer is nothing. Consider a stationary ...

The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. Astronomers strive to observe the universe via ever more advanced techniques ...

Hornof, D., Helm, V., de Dios Rodriguez, E. et al. A snapshot of relativistic motion: visualizing the Terrell-Penrose effect. Commun Phys 8, 161 (2025). https://doi ...

If the Sun were to spontaneously cease emitting light, we wouldn't know about it for about 8 minutes and 20 seconds. The light that's arriving here on Earth, right at this very moment, was emitted ...

Charles Krauthammer turns in a bravura performance in his column today about the recent discovery that some neutrinos appear to travel faster than the speed of light. Krauthammer’s view is that this ...

Researchers have found a way to mimic lightspeed when photographing an object. The method involves stitching together many thin “slices” of light reflecting off the object. Photography—itself a ...