Elephants will sometimes use special rumbles to reassure their calvesElephantVoices Elephants appear to harmonise their vocal rumbles when they join together to form choruses, tuning their voices to sound more alike as the chorus unfolds. The findings come from a machine learning study, which also reveals that this convergence is particularly likely to occur during specific kinds of choruses – such as when elephants reconnect with one another or organise group activities – and that the calls themselves may contain information about what the animals are doing. The findings could offer new insights into how elephants communicate and navigate life within their complex societies, says Sara Keen ...