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Reindeer by mitchanx: Rangifer tarandus are thought to be the only mammals that can see ultraviolet light. A study in 2011 revealed that reindeer can see light with wavelengths as low as 320 nm, considerably below the human threshold of 400 nm. It is thought that this ability helps them to survive in the Arctic, because many objects that blend into the landscape in visible light, such as urine and fur, produce sharp contrasts in ultraviolet light.

THE FAIRY SWAN- My Name is Bonnie Anne and I am 60 years old. Disclaimer: All images are copyright to their respective owners. I am not a photographer and give all credit to the gifted artists featured on my page. I edit my headers and background from...