That is interesting. In law school a woman from Purdue who studied anthropology determined that I had the skull of a masticulator (bark chewer) because of a ridge down the center of the top of my head. In researching Neandrathals and Cromagnums, I discovered they both had a boney structure on the inside of their jaws which I think I have. I think I am the missing link proving Darwin’s theory :>0
How odd.
If by “ridge”, you mean not flat or round but having a distinct “peak” sort of thing, I have that, too.
[and SunkenCiv *always* pings me to the Neanderthal lists just to provoke me]....:))
Yum.
Tasty, tasty birch bark.