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Theory in Biosciences, formerly: Biologisches Zentralblatt, focuses on new concepts in theoretical biology. It is likewise interested in analytical or modelling approaches and in biophilosophy or history of ideas. Central topics are systems theory, systems dynamics, theoretical ecology, evolution, cognition, theoretical neurobiology, visual computation, simulation strategies, and bioethics. Manuscripts present original work with a strong conceptual background. In addition, each issue provides a literature review that comments on recent developments of a selected topic.