“Here’s a tattoo of glucose (b-D-glucopyranose, to be more exact) that I have on my back. Somewhere out there is a young lady with the same tattoo in smaller version on her ankle. Alas, a lost love” –A chemistry professor

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Originally published February 17, 2008. Copyright 2008 Carl Zimmer.

“This is the chemical composition for Metol, which is a developing agent in black and white photo developer.”–Chloe

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Originally published February 17, 2008. Copyright 2008 Carl Zimmer.

“It synthesize the union of the Macro (Universe: c) and the Micro (Quantum: hbar) cosmos.”–Otavio

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Originally published February 17, 2008. Copyright 2008 Carl Zimmer.

Niles writes, “My tattoo is the Pioneer Plaque.” Note from Carl: Here is some background on the Pioneer space missions.

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Originally published February 17, 2008. Copyright 2008 Carl Zimmer.

“Here’s my science tattoo.”–Vincent Iadevaia

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Originally published February 17, 2008. Copyright 2008 Carl Zimmer.