Hyenas don't just laugh; the laugh indicates their social status and age. In this social setting, the head is usually a dominant female in part because females are larger, more aggressive and have three times the amount of testosterone compared to males. This makes hyenas matriarchal. They are also cannibals, ready to devour each other as well as their offsprings in the event of starvation. Additionally, they have extremely tough jaws capable of crushing and grinding the toughest of bones. Their jaw pressure is the most superior in the animal kingdom.