The Cynocephali is a widely attested mythical phenomenon existing in many different forms of contexts. It is essentially a man with the head of a dog. They could understand language but had no ability to speak and they were by all reports savage beasts that live to hunt and kill. These dog-headed men were described in reports by famous explorers such as Christopher Columbus and Marco Polo. According to the Greek physician, Ctesias, their teeth are larger than those of dogs, their nails like those of these animals but longer and rounder.