1. Sodium chloride tattoo.
Tomorrow: Carl Zimmer, who curates a collection of science tattoos. (He also writes about science.) 
my tattoo (by megpi)

    Sodium chloride tattoo.

    Tomorrow: Carl Zimmer, who curates a collection of science tattoos. (He also writes about science.)

    my tattoo (by megpi)

  2. science tattoo

    carl zimmer