The mind-bending concept of time dilation results from a seemingly harmless assumption—that the speed of light is the same for all observers.

Einstein realized that time is relative and passes at different rates for different people.

Waking up early is always hard for everyone. This relative element of time waits for no one. Time, as stated by Einstein himself, is said to be relative. In fact, it is kind of philosophically ...

While time is relative, it still flows in one direction for every observer. We don’t yet understand why, but some physicists are looking for answers that invoke the evolution of entropy, says ...

It's been 100 years since Albert Einstein completed his theories of relativity. They were radical. They reshaped the way physicists view space, time, gravity, even the universe. But try explaining ...