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Infrared Zoo
This online gallery from the California Institute of Technology features thermal infrared photographs of dozens of animals including birds, mammals, reptiles and amphibians, and insects and arachnids. Also includes an illustrated essay on the differences between warm-blooded and cold-blooded animals, and an infrared hide-and-seek game.
http://coolcosmos.ipac.caltech.edu/image_galleries/ir_zoo/

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