caption: The image shows a black and white photo of a rock with a circular pattern on it. The rock appears to be a brachiopod, a type of fossilized ammonite, with a spiral pattern of interlocking ridges and grooves. The pattern is composed of a series of concentric circles, each with a different size and shape, and the center of the circle is a darker shade of grey. The edges of the image are slightly blurred, giving it a dreamy, ethereal quality.