Look for the sagittal suture – the squiggly line that runs the length of the skull – and note whether is it's completely fused. If it is, the remains are likely to be of someone older than 35.

They were connected to the shell by intricate lines known as sutures—the complexity of which varied tremendously throughout this animal’s evolution. The many chambers of their shells likely ...

Any adhesions found are freed. The weakened area of the diaphragm is then grasped with a clamp and elevated to determine the location of suture line. Layers of sutures, sometimes reinforced with ...