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

Atomic nuclei exhibit multiple energy scales simultaneously—ranging from hundreds down to fractions of a megaelectronvolt. A new study demonstrates that these drastically different scales can be ...

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

Alex Keshavarzi digs into the showdown between two competing Standard Model predictions of the muon, which may reveal undiscovered particles hiding in the vacuum ...