Do Touch The Artwork

It's a warning sign at art museums around the world: "Don't touch the artwork."
 But Spain's famous Prado Museum is changing that, with an exhibit where visitors are not only allowed to touch the paintings — they're encouraged to do so.
 The Prado has made 3-D copies of some of the most renowned works in its collection — including those by Francisco Goya, Diego Velazquez and El Greco — to allow blind people to feel them.