Particle accelerator reveals mysterious chemical reaction is destroying…

The work of Vincent Van Gogh may be among the greatest artistic achievements in human history, but barely a century after his death his work is already starting to fade. The bright yellows of his paintings are turning to a murky brown. But this isn't any ordinary decay - and scientists used a particle accelerator to… » 2/14/11 2:14pm 2/14/11 2:14pm