From Maisel's site:
The x-ray serves as a means to explore mythological themes expressed through ancient objects. The shadow-worlds they occupy are informed by the black space surrounding the images, which in some instances becomes a vast nether world, and in others becomes the velvety ground of some kind of brain scan/portrait. The project’s title of History’s Shadow refers both to the literal images that the x-rays create as they are re-photographed, and to the metaphorical content formed by the past from which these objects derive.
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