Artist and chemist Vesna Jovanovic has done Gray one better: she's created anatomy art based on ink blots. Yes, it's pareidolianatomy. This is a very cool gallery of images that, well, has to be seen to be appreciated. For the back story, check out the Seed magazine interview with her. Very cool stuff.
Tip o' the cranial cap to BABloggee Charles who pointed me to the io9 article on Ms. Jovanovic.