100th anniversary of the birth of Andrei Dmitrievich Sakharov

B.L. Altshuler “Andrei Sakharov's research work and modern physics” Phys. Usp. 64 427–451 (2021)

Reviews of topical problems

A.V. Guglielmi, A.S. Potapov “Frequency-modulated ULF waves in near-Earth space” Phys. Usp. 64 452–467 (2021)

Physics of our days

V.I. Zhukova, A.V. Nefediev, P.N. Pakhlov, S.I. Eidel’man “Super-factory of bottomed hadrons Belle II” Phys. Usp. 64 468–494 (2021)

Instruments and methods of investigation

E.N. Ragozin, E.A. Vishnyakov, A.O. Kolesnikov, A.S. Pirozhkov, A.N. Shatokhin “Soft X-ray spectrometers based on aperiodic reflection gratings and their application” Phys. Usp. 64 495–514 (2021)

Methodological notes

G.S. Bisnovatyi-Kogan, I.A. Kondratyev “Free electron gas and electron—positron pair equilibrium in a magnetic field” Phys. Usp. 64 515–528 (2021)

Bibliography

E.V. Zakharova “New books on physics and related sciences” Phys. Usp. 64 529–531 (2021)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 64 532–533 (2021)