Magazine

This edition marks the 50th anniversary of the November Revolution in particle physics – a revolution that completed the second generation of fermions with the charm quark and gave fresh experimental impetus to the development of the Standard Model. The charm sector is no less interesting today: theoretical calculations struggle to explain measurements of mixing and CP violation; and charm–anticharm states exhibit exotic features that pose a fascinating theoretical puzzle in QCD. Elsewhere in these pages: the 23 exotic hadrons discovered so far at the LHC; new results throw a spotlight on anomalous measurements of the mass of the W boson and the magnetic moment of the muon; the latest developments in machine learning for statistics and string theory; and much more.