The first issue of Chaos, published in July of 1991, comprised a selection of 14 now-classic papers authored by leading researchers in nonlinear dynamics.1–14 While some of their distinguished authors—including Vladimir Arnold, Boris Chirikov, and George Zaslavsky—are no longer with us, many of the contributors to the first issue remain active in research and some—Irving Epstein and Leon Glass—are in fact authors of papers in this 25th anniversary issue.
The journal closed its first-year volume with four issues—a format that would be maintained for the following 24 years—including numerous other contributions by eminent mathematicians and scientists such as Yakov Sinai, Arthur Winfree, and Anatol Zhabotinsky. As in most of the 3300 papers published since by Chaos, the common feature of these early publications was not only the framework of nonlinear science but also the interdisciplinary breadth of the applications. Another important ongoing thread woven through the...