BOULDER- Black holes, time travel and E= mc^2. They are all related to Albert Einstein's Theory of Relativity. How many of us, though, can actually explain any of it? This year, Einstein's theory ...

Many theories are rock-solid: Scientists have just as much confidence in the theories of relativity, quantum mechanics, ...

Einstein's theory of general relativity views time similarly to width, height, and length. As such, both time and space can be curved by gravity. This effectively means that time is slower the closer ...

Albert Einstein’s name is synonymous with “genius,” and his wild hair is a trope of its own for mad scientists and professors in popular culture. Einstein’s discoveries led to modern-day inventions ...

As the universe expands, it feels like it must be spreading out from some initial point. But a physicist explains why that’s ...

For over 100 years, two theories have shaped our understanding of the universe: quantum mechanics and Einstein’s general relativity. One explains the tiny world of particles; the other describes ...

Solar eclipses occasion lots of excitement and pique the public's interest in astronomical phenomena. Eclipses can also expand our understanding of the universe in profound ways. In fact, astronomical ...

We all know that black holes are mysterious giants in the universe, with a mass beyond imagination and gravitational forces so strong that even light cannot escape. Our understanding of black holes ...

Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

Hawking's second law of black hole mechanics, also known as Hawking's area theorem, states that the area of the event horizon ...

Researchers at Hiroshima University have developed a realistic, highly sensitive method to detect the Unruh effect—a ...