Ask someone on Earth for the time and they can give you an exact answer, thanks to our planet's intricate timekeeping system, ...

In 1999, Belgian physicist Chris Van Den Broeck implemented a minor alteration to Alcubierre’s concept by shrinking the ...

New research has uncovered an unexpected flaw in Einstein’s theory of relativity — a gap that no one had the tools to detect ...

For close to a century, scientists have been trying to marry Albert Einstein’s General Theory of Relativity and quantum theory—our two best bets on understanding the universe on a macroscopic and ...

We can't see dark matter directly, so studying it pushes the boundaries of our creativity as scientists. How exciting, says ...

A Star Trek–inspired idea by Miguel Alcubierre kicked off decades of theory and experiments as scientists pursue plausible ...

Astronomers observed a white dwarf and subdwarf 4,000 light-years away, spiralling toward collision, testing Einstein's ...

Why do we call the people in our families relatives? It is because they exist relative to us and us to them. Most of the time we see ourselves as the star in our own stories and others as planets ...

Philosophers have agonized over time-travel paradoxes for more than a century, yet the basic concept rests on the same subtle ...

Physicists have demonstrated with unprecedented accuracy that the speed of light remains constant. In 1887, a landmark physics experiment was carried out by American researchers Michelson and Morley.

What if the famous P vs NP problem isn’t just about algorithms but about the observers trying to solve them? Research ...