科学美国人60秒 SSS 2013-09-23（在线收听）

 Iconic works of art get exhibited worldwide but as these painting's age they can become to fragile to estan travel around the globe.The pink can be visually examined to gage the integrity,but the only way to check the canvas had been to move a piece destructively.So a team of researchers in Europe devise a new method for diagnosing the healthable paintings similar to testing a blood sugar without using a needle.The scientist took examples from nearly 200 old canvases or canvas linings from the 19th and 20th centuries.They shined infuriate light on the fabric to access the type of fibers and relative fragility.But those result as reference the scientist then scanned 12 paintings by Salvador Dali.Luckily our 12 are still in stable traveling condition,but they found that the oldest Dali are starting to weaken.The researchers in the journal analytical methods.Scientists stress that the technique is only be evaluated for 19th and 20th century canvases with nocen that fibers. But Dali would about appreciate that does marry the science of art.After all,one of his works is called amenchter cracken warson.