Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.

We go about our busy days, occasionally glancing at our watch or the clock on the wall. But we seldom stop to think about how ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London. Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and ...

Five years ago, on April 10, 2019, the Event Horizon Telescope — a matrix of radio observatories situated around the world that turn the Earth into one giant radio telescope — captured something ...

Standing in the elevator of a towering skyscraper, you might wonder if your journey upward changes more than just your view. The answer might surprise you: time itself actually flows differently as ...