A range of sea urchin spines from different periods of the Earth's history illustrating the diversity of shapes. (IMAGE)

University of Göttingen

A range of sea urchin spines from different periods of the Earth's history illustrating the diversity of shapes.

Caption

A range of sea urchin spines from different periods of the Earth's history illustrating the diversity of shapes.

Credit

Plos One, 2023 Wiese et al.

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