Famous Leonardo self portrait in critical condition

[Reuters]    Art conservation and restoration experts recently concluded weeks of tests on the famous self portrait of one of history's greatest geniuses, sketched in the early 1500s when he was in his 60s.And the diagnosis is decidedly grim. The non-invasive studies confirmed art experts' worst fears: the drawing is seriously damaged and deteriorating and any restoration would be delicate and risky to say the least.