An average person will spend more than 20 years of their lives sleeping. Why?

Anyone who has ever watched professional acrobats in a circus, jugglers on the street, ice skaters, pianists or cello players surely must have been surprised with the extent to which people can develop various abilities by constantly practising. But few have thought of developing their ability to participate more actively in their own dreams during the night. …

Igor Rudan

Director of the Centre for Global Health and the WHO Collaborating Centre at the University of Edinburgh, UK; Editor-in-Chief, Journal of Global Health

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