The Ancestral Shape Hypothesis: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4410577/

https://www.liverpool.ac.uk/archaeology-classics-and-egyptology/blog/2020/ancestral-shape-hypothesis/

The most common direct causes of disc herniation:
https://www.ncbi.nlm.nih.gov/books/NBK441822/#:~:text=The%20most%20common%20cause%20of,of%20disc%20herniation%20is%20trauma.

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