Two studies elucidate key mechanisms limiting the efficiency and stability of organic light-emitting diodes.

A model that includes propagating voids predicts the extent of plasma turbulence in a tokamak.

A hypothetical fifth force could be detected by its effect on the optical transition frequencies of an element’s different isotopes.

The final results from the Muon g − 2 experiment agree with the latest predictions of the muon’s magnetic properties—letting down hopes that the particle would upset the standard model’s applecart.

The harsh interstellar environment ought to destroy these carbon-rich molecules; experiments reveal their secret weapon.