Public domain photos

The image shows a black and white photo of a small rock, which appears to be a microorganism, against a dark background. At the top and bottom of the image, there is text and numbers indicating the size and shape of the rock.

The image shows a black and white photo of a small rock, which appears to be a microorganism, against a dark background. At the top and bottom of the image, there is text and numbers indicating the size and shape of the rock.Open in library