When atoms collide, their exact structure—for example, the number of electrons they have or even the quantum spin of their ...

What makes something quantum? This question has kept a small but dedicated fraction of the world's population—most of them ...

The gas giant WASP 121b, also known as Tylos, has an atmospheric structure unlike any we have ever seen, and the fastest ...

Atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...