High-Resolution Synchrotron X-Ray Scans of <em>Acanthostega</em> Fossil Limb Bones (2 of 2) (IMAGE)

European Synchrotron Radiation Facility

High-Resolution Synchrotron X-Ray Scans of <em>Acanthostega</em> Fossil Limb Bones (2 of 2)

Caption

Top left: body outline of Acanthostega is in black, with the humeri (upper arm bones) represented in red. Bottom left: 3-D model of a humerus of Acanthostega, generated from a synchrotron scan, with magnifying glass indicating position of the high-resolution section shown on the right. Right: 3-D transverse section model through the outer layer of the bone showing blood vessel cavities (in pink) that provide clues about the metabolism of this 360 million-year-old tetrapod.

Credit

Sophie Sanchez, Uppsala University and ESRF.

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