Living in a universe over half of which is composed of imperceivable dark matter poses the question of the uncertainty of material presence. Is everything as it seems, or do things live a secret dual life? How real is what we can perceive? Is a rock really a rock and how permanent is it? Where do things come from and how might they change? What role has the human hand in their making?
Some shapes and objects have been around a long time. Their persistence through time can add another dimension and point to an answer beyond mere materiality.