Lost Pictures: Another DaVinci?

Imagine searching for three decades for a lost image. That's what Dr. Maurizio Seracini has done. He's looking for a lost Leonardo DaVinci mural possibly hidden inside a wall at the Florence (Italy) city hall. In 1975 a researcher spotted a clue, now Seracini is using some really cool scientific gadgetry to find the painting. He's firing neurons through the wall to see if he can find the mural. Saracini and his team are looking for a DaVinci mural, "The Battle of Anghiari" that's triple the size of the "Last Supper." Is it behind a painting by Varsari? Did Vasari construct a brick wall in front of the DaVinci masterpiece? There is a fascinating article by John Tierney in the New York Times about the scientific hunt for this lost piece of art.