Look for a second line at the front of the skull -- the coronal suture – which fully fuses by age 40. Study the teeth. If they're worn down it could be a sign of a poor diet. If they're well ...

All three skulls belong to adult individuals ... a cranial capacity of approximately 1,200 c.c. and with its coronal and sagittal sutures partly fused. The second skull (Skull II of Locus L ...