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Janus cat

A cat with two faces, named Frank and Louie, sits on a mat in his home in Worcester, Massachusetts. The animal is known as a Janus cat, named for the figure in Roman mythology with two faces on one head. The owner calls the face on the left Frank, while the face on the right she identifies as Louie. The cat set a Guinness record by surviving for 12 years in Massachusetts. (AP Photo/Steven Senne, File)

Amazing two-headed animals - It's real

The oldest evidence of a two-headed animal is a good 120 million years old. The fossil of this ancient lizard discovered in 2007 proves that animals with multiple heads are an ancient phenomenon. There are two variants – animals with two heads (bi/dicephalus) and animals with two faces on one head (diprosopus).