Synchronized radiation from arrays of oscillators is widely used in microwave and wireless communications. Phase-locked oscillations produced at the atomic level now pave the way for devices on the nanoscale.

White-light-emitting diodes are becoming increasingly important, but what is the best way to build compact devices possessing high efficiency? Bright prospects are offered by multi-layer organic devices grown from solution.

The behaviour of a seismic fault in Chile seemed to confound predictions of how often giant earthquakes should recur. Examination of a 2,000-year record of tsunami deposits in the region clarifies matters.