Space power is central to communication, navigation, and surveillance. China’s “Space Silk Road” envisions orbital highways of satellites as critical to global influence, much as maritime routes once ...

Philosophical-sounding edge cases help scientists refine their models and explore how and where their theories may fail.

What if the universe remembers? A bold new framework proposes that spacetime acts as a quantum memory. For over a hundred ...

Spacetime itself would also need to be “quantized,” or broken down into constituent parts. This is what the notorious string theory attempts to do, as does loop quantum gravity, currently considered a ...

Traveling at warp speed is now no longer an impressive sci-fi idea, as researchers at the University of Alabama, Huntsville have suggested a new theory for a warp drive that follows the theories of ...

The story begins with the black hole information paradox. According to relativity, anything that falls into a black hole is ...

Although quantum mechanics and general relatively help explain the universe—at both small and cosmic scales—the two theories are fundamentally incompatible with each other. This has spawn theories ...

There is a glaring gap in our knowledge of the physical world: none of our well-established theories describe gravity’s quantum nature. Yet physicists expect that this quantum nature is essential for ...

It was already a mind-bending shift, last century, to go from Isaac Newton’s absolute space and universal time to Albert Einstein’s four-dimensional space-time, which is dynamic, flexible, sensitive ...

This Star Trek concept ignited a dream that humans could one day travel faster than the speed of light. Now physicists are ...