Did Michelangelo include a hidden caricature of himself in one of his famous sketches?
(PHYSorg.com Archaeology & Fossils)

A new Clinical Anatomy article presents evidence that Michelangelo inserted his self-portrait into a sketch of his close friend, Vittoria Colonna, which is currently in the collection of the British Museum in London, England. This self-caricature of Michelangelo may serve as a tool for analysing the artist`s probable bodily dimensions and even his state of health at the time.