Today is Memorial Day here in the US, but as I'm not much for the military, I found something else more worthy of memorializing: scientific thought and inquiry. So for all you nerds out there, especially those of you who are all inked-up, I found something awesome. Science writer Carl Zimmer (who I'm assuming does not have any tattoos) has a gallery of science-related tattoos that people have sent in. Some are simple, others incredibly complex. Regardless, it's a great gallery with explanations from the inked themselves.