The Sunflowers of Vincent Van Gogh are literally wilting. His cornea-searing yellows are turning dull brown as the chromium in the Vincent-beloved chrome yellow pigment undergoes reverse oxidation with UV light. This seems to only happen to the chrome yellows brightened with barium sulphate white. ‘Cause science. That’s what you get for trying harder. French scientists suggest that Van Gogh’s sunniest paintings should be kept in the darkest corners of museums as a precaution. A little part of Vincent might have enjoyed this.