A unicorn is a legendary creature that looks like a horse or a goat with a monocerous on its forehead. The unicorn appeared in early Mesopotamian illustrations, and it was also mentioned to in the historical stories from India and China.  The initial description in Greek text of a monoceros animal was made by the historian Ctesius around 400 BCE, who associated that the Indian wild ass was the size of a horse, with a faded body, a purple head and blue eyes, and on its forehead was a cubit-long tube coloured red at the sharp end, black in the middle