A new series begins this week. 'Horizons' are commissioned articles in which experts speculate on what will happen over the next few years in their fields. On the cover, one of Antony Gormley's figures in his Another Place installation sets the tone. In the first piece, Thomas Kirkwood considers the potential of systems biology to de-link disease and old age. Peter Murray-Rust writes on a new 'open' approach to chemistry. But his subtext is broader: the future of the 'semantic web', where computers can make as much use of information as humans can. M. Armand and J.-M. Tarascon show how advances in materials science can provide the batteries of the future. George Koentges tackles 'evo-devo', the marriage of fossil evidence, genomic sequencing and molecular developmental biology. And R. J. Schoelkopf and S. M. Girvin raise the prospect that circuit quantum electrodynamics could pave the way for practical quantum computing and communication. On page 643, Nature editor Philip Campbell sets out the brief for these and future Horizons. Cover photo: Andrew Barker/Alamy