Stone Age medicine was far more advanced than previously thought, scientists discovered, after unearthing the 7,000-year-old skeleton of a man with an amputated arm.

Early Neolithic surgeons used a sharpened flint stone and rudimentary anaesthetics to amputate the elderly man’s left forearm, and treated the wound in sterile conditions, experts believe.

Evidence of the early surgery was unearthed by Cécile Buquet-Marcon and Anaick Samzun, both archaeologists, and Philippe Charlier, a forensic scientist, during work on a tomb discovered at Buthiers-Boulancourt, about 40 miles south of Paris.