Erratum

On last week’s front page, the caption should read: “The change from the oblong skull and protruding face of ancient humans (right) to the modern rounder skull and retraced face (left) is associated with a sharper bend in the floor of the brain case.”

(The sharper flexion may be due to an increase in the relative size of the brain’s temporal lobes.)

The images at the bottom of the page should have been credited to Musée De L’Homme/National Museum of Natural History (London).