A new recipe of "quadratic gravity" could help to better define the picture of the Big Bang and the singularity that existed ...

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Astronomers have long been puzzled by a cosmic mystery: planets orbiting two stars—like Star Wars’ Tatooine—are surprisingly rare, even though they should be common. New research suggests the culprit ...

The concept of spacetime, first described in Einstein's theory of general relativity, has since been widely studied by many ...

The implications of quantum mechanics suggest reality isn't as solid as we think it is, but physicist David Bohm had a spin ...

The video that Nadira, Lady Naipaul, sent was entitled “Death Doesn’t Exist”. Feynman died in 1988, so he must have made the video before that, ironically asserting that it wouldn’t happen? No!

(bymuratdeniz/iStock/Getty Images Plus) Although there are many variables in life, there's one metric by which our existence ...

By studying galaxy clusters separated by hundreds of millions of light-years, Penn physicist Patricio Gallardo and ...

Plasma, the fourth state of matter, consists of a gas in which electrons are no longer bound to atoms, which allows ...

History shows that struggle is unavoidable. It’s interesting to think about what the world looked like for America’s Founding ...

Planets orbiting two stars were expected to be everywhere. Instead, astronomers have found only a few, and new research ...

The ISS uses filtration, distillation and catalytic reactors to purify wastewater into safe drinking water for astronauts.