This video from Cambridge University in England says about itself:
2 February 2015
It was thought that no bronzes by Michelangelo had survived – now experts believe they have found not one, but two – with a tiny detail in a 500-year-old drawing providing vital evidence. – See more here.
They are naked, beautiful, muscular and ride triumphantly on two ferocious panthers. And now the secret of who created these magnificent metre-high bronze male nudes could well be solved. A team of international experts led by the University of Cambridge and Fitzwilliam Museum has gathered compelling evidence that argues that these masterpieces, which have spent over a century in relative obscurity, are early works by Michelangelo, made just after he completed the marble David and as he was about to embark on the Sistine Chapel ceiling.
If the attribution is correct, they are the only surviving Michelangelo bronzes in the world.
A new 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 analyzing the artist’s probable bodily dimensions and even his state of health at the time. In the portrait of Michelangelo’s friend, a small figure can be seen standing in the area immediately in front of her abdomen and between the lines that form part of her dress. The caricature is leaning forward at an acute angle, as if he himself were drawing the portrait. The caricature may have been a signature of sorts: here.