Mimicking the effects of the drug ecstasy seems to restore normal social behaviour in mice modified to have social difficulties.

Robert Malenka at Stanford University in California and his colleagues have been studying sociability in mice, as a way to understand why some people with autism can find social situations unpleasant and confusing. They have found that mice missing a section of DNA are less interested in spending time with other mice. The equivalent region of human DNA is often missing in people …