A few years back, I [science journalist Carl Zimmer] noticed a DNA tattoo on the arm of a neuroscientist. He informed me that it spelled out his wife’s initials according to the genetic code.

I’ve archived the ~300 tattoos here at National Geographic so that future generations of researchers can analyze them for clues to the folkways of scientists and the scientifically-minded in the early twenty-first century.

By Carl Zimmer via National Geographic.
Zimmer’s book available on Amazon as Science Ink: Tattoos of the Science Obsessed