In saying that everyday atomic hearts have equal protons and neutrons, the News story ‘Physicists plan first antimatter road trip’ (Nature 554, 412–413; 2018) didn’t take account of the fact that some elements, such as hydrogen and lithium, have uneven numbers of protons in their most abundant form.

The News Feature ‘The entangled web’ (Nature 554, 289–292; 2018) misstated the leadership of the Dutch demonstration quantum network. The project is co-led by Ronald Hanson and Stephanie Wehner of Delft University of Technology in the Netherlands and Erwin van Zwet at the Dutch research organization TNO in The Hague.