Carl Zimmer’s Science Tattoo Emporium has an interesting gallery of tattoos inspired by science and worn by scientists under their lab coats! Unbelievable? Yes, its true. Scientists too carry tattoos on their skins and they don’t scratch their heads for symbols. Science is full of interesting symbols and formulaes.
Here is one of the inspired tattoos from the web-site. Dihydrogen monoxide is nothing but the chemical formula of water, important source of sustenance on this planet. Water molecules on blue background! It can have many interpretations. For me it is the symbol of life on our blue planet.