Horns v Antlers

Horns are bone coated in a protein. They stay on the animal's skull.

Examples include:


 * Bison
 * Cows
 * Giraffe
 * Utahceratops
 * Pachycephalosaurus

Antlers are bones, and they can come off the animal's skull in many cases.

Examples include:


 * Moose
 * Deer
 * Elk