This false-coloured scanning electron micrograph (SEM) shows caffeine crystals. More:
http://www.huffingtonpost.com/2012/06/21/wellcome-image-awards-2012-science-images_n_1616148.html
http://www.huffingtonpost.com/2012/06/21/wellcome-image-awards-2012-science-images_n_1616148.html

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