Biologists have debated the reason why Homo sapiens evolved a prominent lower jaw, but this unique feature may actually be a ...

Humans are the only creatures on Earth whose lower jaw ends in a distinct bony knob, a true chin that juts forward from the rest of the mandible. Fossils show that even our closest extinct relatives, ...

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 ...

Dashiell Hammett mentioned Sam Spade's jutting chin in the opening sentence of his novel, "The Maltese Falcon." Spade's chin was among the facial features Hammett used to describe his fictional ...