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Terrestrial Origins and Evolution
collage of birds


A collage of images. Top, optical images of: blue jay feather, squid, and fossil fish with feather. Bottom: x-ray images showing the distribution of copper (red) in the same organisms. Copper in the dark parts of the feathers, the fish eye, and the squid ink sack indicates the presence of eumelanin pigmentation and in combination with other elements can be used to map pigment distributions in fossils and existing organisms. Photos by: Phil Manning/Nick Edwards/Holly Barden, University of Manchester. Data were collected at the Stanford Synchrotron Radiation Lightsource. Image created by: Gregory Stewart, SLAC National Accelerator Laboratory

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