"Dark Matter" illustrates with stunning visuals one of the most captivating developments of modern science: the mystery of dark matter in the universe, and the worldwide race currently in progress to discover its nature. The text, adapted from the popular science book "Behind the Scenes of the Universe: from the Higgs to Dark Matter" by Gianfranco Bertone, is enriched with tons of images, videos and interactive content. It also features hundreds of links to the most informative and spectacular resources on the web.