The world’s best clocks may be sensitive to an odd mix of quantum and relativistic effects that would stretch time and test ...

Space and time seem like two completely different ideas, but Einstein showed they are interlinked in what is known as ...

For decades, quantum physics and general relativity have stood as two powerful but separate theories. Quantum physics explains the behavior of tiny particles like atoms and photons. General relativity ...

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 ...

Scientists have spent decades trying to understand how gravity operates at its most basic scale. However, no theory has come close to fully explaining it. Now, though, a new theory could finally give ...

Bottom line: For decades, physicists have been trying to solve one of the greatest mysteries in science: how gravity operates at the smallest scales governed by quantum mechanics. While we have ...

When you follow Einstein’s math step by step, you enter a world where intuition starts to break down. His equations of ...