For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.
What would happen if you were to put both of yours legs in these westernmost and the easternmost parts?
Your legs would glitch around the whole circumference of the Earth.
You would have both legs in Alaska.
You’d probably drown.