What if the Big Bang didn't begin with a singularity? This point of infinite density, which so divides physicists, could be ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Which is more fundamental, mind or matter?

Theories of quantum mechanics predict that some particles can exist in superpositions, which essentially means that they can ...

A new physics paper takes a step toward creating a long-sought "theory of everything" by uniting gravity with the quantum world. However, the new theory remains far from being proven observationally.

Physicists have long suspected that there is a layer of physical reality beneath quantum theory and a new mathematical model unveils just how strange it might be ...

A new theory of quantum gravity, which attempts to unite quantum physics with Einstein's relativity, could help solve the puzzle of the universe's expansion, a theoretical paper suggests. When you ...

Quantum mechanics and general relativity are the two pinnacles of 20th-century physics. In their respective fields, scientists have demonstrated time and time again how correct these theories are.

Quantum entanglement can link two objects even when they are separated by extremely large distances. But a new study has found a limit at which such quantum correlations stop – and surprisingly, ...

If you could take an apple and break it into smaller and smaller parts, you would find molecules, then atoms, followed by ...