They are dropped by alpha rexes (the rarest creature in the game) and the skull can be put on a trophy wall mount!

Yay no NOOO I’m not happy AT ALL why??? Cuz he almost killed my dangerous rabies ( Spino ) he was like at 30 hp and I said no let’s run AT HOME FAST BEFORE THAT REX SEES US and I was so unlucky like there was a whole pack of 3 Allosaurus in front of my spino and I ran randomly until they saw me and I was like: no I’m ded Rn 💀