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Terrestrial Origins and Evolution
This is a close-up of the head region of the Alalcomenaeus fossil specimen with the superimposed colors of a microscopy technique revealing the distribution of chemical elements in the fossil.
10/18/13

 

This is a close-up of the head region of the Alalcomenaeus fossil specimen with the superimposed colors of a microscopy technique revealing the distribution of chemical elements in the fossil. Copper shows up as blue, iron as magenta and the CT scans as green. The coincidence of iron and CT denote nervous system. The creature boasted two pairs of eyes (ball-shaped structures at the top). Credit: N. Strausfeld/University of Arizona



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