The News story 'No star left behind' ( Nature 453, 437; 2008) misstated the number of constellations constructed for an index in starmatching software. The number of constellations is 800 million not 800,000.

In the News story 'Climate anomaly is an artefact' ( Nature 453, 569; 2008) we incorrectly stated that David Thompson was at the State University of Colorado in Boulder. He is in fact at the Colorado State University in Fort Collins.