You thought the "Longhorn" name was only for cattle? Not so! Here's an example of the very rare longhorned unicorn. So few have been seen, in fact, that nobody is sure what color they are -- so you can make the... See it!
The caduceus -- which represents the staff carried by Hermes in Greek myth (aka Mercury to the Romans) -- has been one of the symbols of the medical profession in the US since 1902.
... See it!