25 new entries, particularly in the areas of cosmology, particle physics, and astrophysics, including Deep Underground Neutrino Experiment, kilonova, leptoquark, and muscoviumDetailed appendices, updated for the new edition, include the periodic table, the electromagnetic spectrum, and a detailed chronology of key dates15 new diagrams add to the clarity and accessibility of the text, with 150 line drawings, tables, and graphs in totalUp-to-date recommended web links accessible via the dictionary's companion website