When you buy through links on our articles, Future and its syndication partners may earn a commission. CT scans of a Neanderthal skull (left) and a modern human skull ...

(The originals are at the Musée de l'Homme in Paris.) The Neanderthal skull and jawbone (above, at left) belong to the so-called "Old Man" of La Chapelle-aux-Saints, a nearly complete skeleton ...