The most accurate measurements yet of the sun’s shape show that magnetic activity plays a role in making the sun appear more oval than it really is.

In sifting through the ashes of a short-lived subatomic particle called the kaon, physicists are slowly accumulating new hints that the theory of elementary particles might one day have to be modified.

Math Trek: If we have free will, so do subatomic particles, mathematicians claim to prove.

A new study suggests that a surprising number of universes, even those with laws of physics different from those in our universe, can still support stars.

God doesn’t play dice, Einstein said in his critique of quantum theory. But any alternative theory to quantum mechanics would require certain quantum events to influence each other 10,000 times faster than the speed of light, physicists have shown.

Simulating new materials could help in building them — but only quantum simulators could fully model reality. A team reports a first step in realizing quantum simulation.

Scientists may have solved the mystery of what triggers the events that spark the northern and southern lights.