Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...

Time is often treated as constant, but Einstein showed that it isn’t. Speed and gravity both affect how fast time moves, and ...

Last week, we touched upon E=mc2, and how Einstein’s theory of relativity turned the world of physics upside-down. Now, we’re using that theory to show why the very concept of time may not be what you ...

Oftentimes, we think of space as an endless, mostly empty vacuum, a silent backdrop where planets, stars, and galaxies play out their dance. We also think of time as something separate, a steady ...

Time dilation: It’s a staple of science fiction, and whether you’re familiar with the term or not, you’ve probably encountered it in print or film. Fly fast enough to the speed of light, and your ...

Time is not the same everywhere in space. On Mars, it flows on average 477 microseconds more each Earth day (24h) than on Earth, an imperceptible but real difference that originates from the laws of ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Quantum mechanics is our most successful physical theory. Created to account for atomic phenomena, it has a vast range of applications extending well beyond the atomic realm, from predicting the ...

Astronaut Matthias Maurer of ESA (European Space Agency) is pictured on the International Space Station's truss structure during a spacewalk.NASA Time can appear to move faster or slower to us ...

Robin Zabiegalski (they/them) is a queer, non-binary writer with over eight years of experience writing for digital media. Robin previously covered Star Trek for Heavy.com and has interviewed several ...

I have a question regarding time dilation that I thought of last night listening to an audiobook, Project Hail Mary. I am an amateur astrophotographer, and marvel at the distance to deep-space objects ...

There is no question that quantum theory is correct. It’s been proven over and over, both in the lab and through practical achievement. But the question remains: is it always correct? Quantum ...