Miocene Giraffe Had Disk-Shaped Headgear and Head-Neck Joints Adapted for Head-Butting Combat

Fossil Evidence Just Added Fuel to The Debate Over The Purpose of Giraffe Necks

Ancient Giraffe Relative Was Evolution's Headbutting Champion, Perhaps Besting Dinosaurs

This ancient giraffe relative head-butted rivals with an ‘amazing sexual weapon’