Well we have a lot of old stuff that is valuable. And shockingly the stuff doesn't get any newer — quite the opposite. Knowing what it consists of is important

Well we have a lot of old stuff that is valuable. And shockingly the stuff doesn't get any newer — quite the opposite. Knowing what it consists of is important for keeping it in good condition. Which a thing like the Mona Lisa this is both culturally and economically a no-brainer.