A jaw tip worn down by nearly a tenth does not sound like much until you picture what it means. Chipping, cracking, scratches ...

Whole skeleton of Dipterus, an extinct lungfish from the middle Devonian period. Specimen (UMMP 16140) from the University of Michigan Museum of Paleontology. ANN ARBOR—If you're reading this sentence ...

Fossil jaws reveal giant prehistoric octopuses may have ruled ancient oceans as powerful apex predators during the Cretaceous ...