Volume 590 Issue 7847



News Features

News & Views

Accelerator-based light sources get a boost p.556

The structure of matter can be explored using the light emitted by particle accelerators. An experiment demonstrates how the properties of two such light sources — synchrotrons and free-electron lasers — can be combined.

doi: 10.1038/d41586-021-00431-2

Antimatter in the proton is more down than up p.559

Protons are found in all atoms, so it might be surprising to learn that they contain antimatter. It now emerges that there is an imbalance in the types of antimatter in the proton — a finding for which there is no agreed theoretical explanation.

doi: 10.1038/d41586-021-00430-3