The skeleton of a young 6ft 5in-tall (1.9m) Viking-era man who had undergone trepanation has been found in a mass grave.A hole had been bored in his skull while he was alive. It had signs of healing before his remains were flung into a burial pit with nine other men, some dismembered...The grisly discoveries were found during a University of Cambridge training dig just outside the city last year...If the young man had had a tumour on his pituitary gland, this could have caused an excess of growth which might explain his height, explained Biers, curator of the Duckworth Collections...