Scientists in Paris have been looking into a charcoal drawing of a woman, which was until now believed to have been drawn by Leonardo’s students. The drawing, titled Joconde Nue, shows a topless woman who bears a striking resemblance to the Mona Lisa that hangs at the Louvre museum in central Paris. Experts at the same museum have concluded, after weeks of tests, that the charcoal drawing was “at least in part” actually done by Leonardo himself.