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Electron microscopy image of pigeon liver tissue, with full colorization of cells. (Lisowski et al via SWNS)
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Homing pigeon being released by scientist at Max Planck Institute of Animal Behavior in Germany. (Christian Ziegler/ Max Planck via SWNS)
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Histology of pigeon liver tissue, depicting iron-containing macrophages (blue). (Lisowski et al via SWNS)
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(Photo by Rajesh S Balouria via Pexels)
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