Meet Narwhal, an adorable rescue dog from Missouri who happens to have a very unusual appendage.
A large horned beast known as the 'Siberian unicorn' could be the origin of the modern unicorn legend.
A pony dressed up as a unicorn managed to escape from a children's photoshoot in California last week.
The animal was found to have a rare deformity that resulted in a single unicorn-like antler.
An incredibly rare species of ox that hasn't been seen for 14 years has turned up on a WWF camera trap.
The country has attracted attention again this week with a rather strange claim from archaeologists.
Campaigners have proposed adding a 75ft horn to the famous 3000-year-old chalk horse in Uffington.
A cow with a giant horn growing from its forehead has attracted a great deal of attention in China.
A video showing what appears to be a unicorn running through the woods has been confirmed to be a hoax.