Have a nice day. If you come across that demonstrable science, I will definitely look.
Show just one experiment that shows the necessary curvature, just one that show axial or orbital speed, and for an added bonus, if you find one that shows water violating the natural physics involved in fluid dynamics by showing water sticking to the outside of any shape as opposed to filling its container and lying horizontal on top, then I'm definitely interested.
The physics governing water is extremely clear! Water finds its level. Spirit levels work on this very principle and have guided us in the building of incredible structures for centuries.
Water does not stick to the outside of a ball; water fills its container and lies perfectly flat on top:
Science^^^^