Craniosynostosis is a condition where one or more of the sutures in a baby's skull close prematurely, leading to abnormal head shape and potentially affecting brain development. This condition can ...

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.

One of the cranial sutures — the wiggly lines on a skull where the individual bones fuse during life — was already closed, which does not normally happen until a person is older than 65.