This is a close-up photo of one of our city museum's central attractions. It stands outside the museum. It is the trunk of a fossilised or silicified tree, an Araucarioxylon karooensis, long since extinct. The museum notes: "The woody tissue was replaced molecule for molecule by silica dioxide. Being a perfect, although slightly squashed, replica of the original tree, it is possible to study the cell structure." You may click on the photo to enlarge.