Micro-estructuras en los copos de nieve
http://www.visualnews.com/2010/12/20/snowflakes-up-close-a-small-fragile-world/
http://www.visualnews.com/2010/12/20/snowflakes-up-close-a-small-fragile-world/
http://www.visualnews.com/2010/12/20/snowflakes-up-close-a-small-fragile-world/
http://www.visualnews.com/2010/12/20/snowflakes-up-close-a-small-fragile-world/
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