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Chameleons can quickly change their appearance in response to the temperature, environment, or their mood. The secret is in their skin. Chameleons have cells in their skin that contain pigment, a material that reflects colors of light. The top layer of skin contains yellow or red pigment. The middle layer is packed with tiny, colorless crystals. These nanocrystals reflect light. The lower layer is filled with a dark pigment called melanin.


These two male panther chameleons had a fight. Guess which chameleon won?


6 NATIONAL GEOGRAPHIC EXPLORER


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