Molecular simulations: past, present, and future (a Topical Issue in EPJB) G. Ciccotti, C. Dellago, M. Ferrario, E. R. Hernández and M. E. Tuckerman Eur. Phys. J. B, 95 1 (2022) 3 Published online: 05 January 2022 DOI: 10.1140/epjb/s10051-021-00249-x