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 ...

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

Physicists have long suspected that there is a layer of physical reality beneath quantum theory and a new mathematical model ...

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

The Big Bang is often described as the moment everything began — a point of infinite density where the laws of physics broke down. But what if that picture is incomplete? A new study proposes a ...

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

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

Nobel Prize-winning physicist David Gross has cast doubts over humanity’s future and survival in the quest for a unified ...

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