A bighorn ram’s horns can weigh as much as all of the bones in its body combined! 🐏 Males will use their horns to fight for dominance, or a mate. Charging at each other at speeds of up to 20mph, these clashes can last for hours, until one of them admits defeat. #EarthCapture by @inthesemountains . . . . #BighornSheep #RockyMountains #WildlifePhotography #MammalsOfInstagram