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28 August 201922.09 Obtained the portrait of the ancestor of our great-grandmother Lucy: rewrite the knowledge on the ancestors of man. Made possible thanks to the skull that belonged to a hominid of 3.8 million years ago, it indicates that its species and that of Lucy, lived 3.2 million years ago, have lived together for 100,000 years. Published in Nature, the result is due to two studies led by Yohannes Haile-Selassie of the Cleveland Museum of Natural History. Participants included Antonino Vezzana and Stefano Benazzi of the University of Bologna.