South-west Sweden's best preserved rock painting has now been dated—it is from the late Stone Age. With the aid of new technologies, researchers at the University of Gothenburg have been able to reveal a number of previously unknown motifs that are no longer visible to the naked eye. The most important of these newly discovered motifs are boats with elk-head stems. This is the first time that these kinds of boats have been documented in southern or western Scandinavia and these motifs provide further evidence of the long-distance sea voyages undertaken by Stone Age maritime hunters.