Unicorn wiki:
egendary%20creature">legendary creature embodied like a horse, but slender and with a single â usually spiral â horn growing out of its forehead. Though the popular image of the unicorn is that of a white horse differing only in the horn, the traditional unicorn has a billy-goat beard, a lion's tail, and cloven hoofs, which distinguish him from a horse. Interestingly, these modifications make the horned ungulate more realistic, since only cloven-hoofed animals have horns (see "man-made unicorns" below). Marianna Mayer has observed (The Unicorn and the Lake), "The unicorn is the only fabulous beast that does not seem to have been conceived out of human fears. In even the earliest references he is fierce yet good, selfless yet solitary, but always mysteriously beautiful. He could be captured only by unfair means, and his single horn was said to neutralize poison."
See more at Wikipedia.org...