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WASHINGTON, May 5, 2011 â€� How scientists use chemistry to tell whether works of art are the valuable real thing or worthless forgeries is the topic of the latest episode in the American Chemical Öйú365betÖÐÎĹÙÍø’s (ACS) award-winning Bytesize Science podcast series.

The high-definition video, “Is that ‘priceless� painting the real deal or a cheap fake?� is available without charge at and on the . It is based on an article in the latest issue of , ACS� quarterly magazine for high school students.

This episode describes the “Wacker Case,� one of the most famous frauds in art history, to illustrate the amazing ability of forgers to fool experts, let alone the general public, about the authenticity of works of art. The case involved 33 works allegedly painted by Vincent van Gogh and helped foster the development of scientific techniques, many based on chemistry, to examine paintings at the molecular level and determine their authenticity.