Our universe emerged when spacetime’s building blocks “crystallized” into being, according to a controversial theory.

Every satellite in the Global Positioning System carries an atomic clock, and every one of those clocks is deliberately ...

Einstein's theory of general relativity views time similarly to width, height, and length. As such, both time and space can be curved by gravity. This effectively means that time is slower the closer ...

We all have some past events that we'd like to undo. These can be minor moments, such as a failed exam or an argument with friends, or world-changing incidents, such as the 2019 outbreak that led to ...

In many universes, typically those on TV shows or in movies, time travel is not much more difficult than driving downtown in any major city during rush hour. Sure, the traffic can get gnarly, but no ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. It's difficult to appreciate how revolutionary of a transformation it ...

Learn how ocean-surface echoes reshape whale calls and why a similar effect in light would not violate Einstein’s theory of ...

When he unveiled his general theory of relativity, Albert Einstein wasn’t exactly met with applause. Almost no one else could do the math necessary to understand his abstract ideas, and at the time he ...

As researchers detail in a study published today in the journal Nature, a star dubbed S301 exists so close to Sagittarius A*, ...