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Prussian Blue was the first synthetic blue pigment - but it seems its  
role in nature goes even deeper:

http://www.sciencedaily.com/releases/2009/12/091214121451.htm? 
utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A 
+sciencedaily+%28ScienceDaily%3A+Latest+Science+News% 
29&utm_content=Google+Feedfetcher

Interesting!

KG


"Never doubt that a small group of thoughtful, committed citizens can  
change the world. Indeed, it is the only thing that ever has."  -  
Margaret Mead

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