All articles tagged with #jaw mechanics
The Nile crocodile has the strongest bite ever measured in a living animal (about 3,700 psi), but its opening jaw muscles are minuscule, so the mouth is easy to pin shut. This extreme closing power paired with weak opening muscles is an evolutionary design that favors ambush predation in water and the famous death roll, a strategy honed over roughly 100 million years.
Researchers studied the jaws of the bristle worm Perinereis cultrifera and found metal ions concentrated at the bite tips, making those regions harder and wear‑resistant. The jaws also show a size‑dependent elasticity and a metal‑like nanoindentation behavior (Nix–Gao effect), supporting a formal concept of bio‑metals and suggesting routes for bio‑inspired material design.
New research suggests dinosaurs had soft tissue structures called 'exoparia' that functioned like cheeks, indicating they may have chewed their food more mammal-like than previously thought, challenging traditional views of dinosaur anatomy.
Scientists have discovered that the ancient fish Alienacanthus had one of the most extreme underbites ever recorded, with an immensely elongated lower jaw studded with teeth. This placoderm fish from the Devonian period had a unique jaw mechanism that allowed its upper jaws to move independently of the skull to accommodate its lengthy lower jaw. Researchers believe that Alienacanthus may have used its underbite to trap live prey, and its discovery sheds light on the diverse jaw forms and proportions that evolved during the Late Devonian period.