The human skull has many components. In fact, in an average adult human, the skull combines 22 bones. One of these bones is the mandible, more commonly known as the lower jaw. Recognized as one ...

A person may clench their jaw or grind their teeth without noticing it ... TMJ disorders affect the joint that connects the skull and the lower jaw, as well as the surrounding muscles.

But the recent discovery of a fossilized Alienacanthus skull ... its lower jaw to stun or injure prey. Dr. Jobbins thinks the elongated jaw, which was studded with recurved teeth that extended ...