F rom the small ossicones on a giraffe to the gigantic antlers of a male moose—which can grow as wide as a car—the headgear of ruminant hooved mammals is extremely diverse, and new research ...

These horn-like “ossicones” start off as soft cartilage and turn to bone over the course of a giraffe’s life, so adult skulls have what look like two antlers. The giraffe’s tufty ...