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This ammoglyph consists of a circular groove, a central depression and two possible knee impressions. Charles HelmThe urge to draw images in sand, or create sand sculptures, seems to be irresistible, as a walk on many a modern beach or dune surface will show. Sand is a vast canvas – and may have been used as one for far longer than people realise. When people think of ancient palaeoart, cave paintings (pictographs), rock engravings (petroglyphs), images on trees (dendroglyphs) or arrangements of

Andrew carrAfrica blombosUniversity of leicesterNelson mandela universityBlombos museum of archaeologySouth africaBlombos museumCharles helmSand sculpturesHuman ancestorsCentral depressionCape south coastPleistocene epochRock engravings