According to Einstein, time is not fixed - it changes depending on speed and gravity. On Mercury, closer proximity to the Sun slows time ever so slightly. This episode explores gravitational time ...

110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a little more sense ...

For those who watch gravitational waves roll in from the universe, GW250114 is a big one. It's the clearest gravitational wave signal from a binary black hole merger to date, and it gives researchers ...