Dark Matter Dimensions is the fourth full-length studio album by Swedish metal band Scar Symmetry. It is the first album to feature new vocalists Roberth Karlsson and Lars Palmqvist after Christian Älvestam's departure. It was released on October 2, 2009 in Europe, and on October 20, 2009 in North America.
According to drummer and lyricist Henrik Ohlsson, the title Dark Matter Dimensions refers to the "appreciation and acknowledgement of the unseen worlds and dimensions, because without the existence of these unseen forces our physical universe would never be able to exist".
Critics noted that while newcomers Karlsson and Palmqvist's vocals could not quite match the ability of Älvestam's, they did not detract from the album's quality; with BBC Music commenting that they had the "ability to overlap", adding "further depth to the complex, aggressive melodies that Scar Symmetry fans have come to expect". Music videos were created for "Noumenon and Phenomenon", "Ascension Chamber" and "The Iconoclast".