This Massachusetts cat with two faces has become the world's longest surviving so called "janus" feline at 12 years of age. The cat, who is named Frank and Louie, has two mouths, two noses and three eyes. Frank and Louie have one brain, so the faces react in unison. (REUTERS/David Niles)
Update: via the comments, interview with the owner and video of the cat(s), who appear to be very happy and well taken care of.