Ping
He left out many other factors or conditions:
1. gravity which is stronger at the equator than at the poles
2. tides which vary at different latitudes
3. evaporative sweating which occurs more nearer the equator
3a. non-evaporative sweating which occurs in northen latitudes
4. large iron-magnetite magnetic deposits which are found not near the equator
5. uramium deposits which are found not near the equator
6. Mosquitos which tend to be found in greater numbers near the equator
7. the jet stream which tends not be near the equator
8. butterflies which get tend to get smaller north and south of the equator
9. lizards which occur more near the equator than at laitudes distances away north and south
10. turtles which tend to be larger near the equator whose inhabitants therein feast upon yea turtle soup, as opposed to those in northern and southern latitudes
11. interbreeding with blond-haired women which occurs more in European northern latitudes than anywhere else
12. palm trees, coconut trees [and their respective oils] which grow near the equator and cannot survive in the northern latitudes
Vitamin D3 also raises good cholesterol... probably a good investment for those with digestive disorders.