Happy Leap Year! This special occasion deserves a purple squirrel. These rare creatures show up in the media about once every four years. There was a sighting in Pennsylvania earlier this month, in southern England in 2008 and in Minnesota in 1997. Most guesses about how a gray squirrel ends up colored purple involve exposure to dye, ink or paint.
Note: There is a more terrifying hypothesis posed by Krish Pillai, a Pennsylvania computer science professor. He suggests bromine-contaminated groundwater from fracking operations: “That color looks very much like Tyrian purple. It is a natural organobromide compound seen in molluscs and rarely found in land animals. The squirrel has too much bromide in its system possibly from all the bromide laced frack water its been drinking.”