NEWSMOVIE: Believed to be Leonardo da Vinci's self portrait, 'The Man in the Red Chalk,' has been vanishing from the paper it was drawn on in the early 1500s. Now analysts think they have a way to ... more 
NEWSMOVIE: Believed to be Leonardo da Vinci's self portrait, 'The Man in the Red Chalk,' has been vanishing from the paper it was drawn on in the early 1500s. Now analysts think they have a way to preserve it from further damage. less 
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Fri, Jun 6, 2014 5:17 AM EDT