Starting to look at a Cochrane Review of Water fluoridation and prevention of dental caries or tooth decay as well as dental fluorosis.

It's complicated but valuable because as we work through questions on this scientific subject it helps us think about how science is used and misused in the general culture.

https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD010856.pub2/full

https://en.wikipedia.org/wiki/Spherical_Earth