mikejuk writes: When a sketch that looked like a self portrait of Leonardo Da Vinci was found under the text in the Codex on the Flight of Birds many months of careful forensic style reconstruction produced a clean image. Now, Amelia Carolina Sparavigna of the Dipartimento di Fisica Politecnico di Torin, with the help of some open source image manipulation software the same job has been done in a few minutes. See what the young Leonardo looked like and ask yourself if you could do better with your favourite image processing software... Link to Original Source
"The urge to destroy is also a creative urge."
[ed. note - I would say: The urge to destroy may sometimes be a creative urge.]