Read the piece on Foucalt's Pendulum in full if you are able to look at that. It behaves along the same mathematical premises as a gyroscope coming to a stop. In different parts of the world both simple machines act differently. Yet the exact motion can be predicted bases on its placement on the face of the earth. The math is relatively simple and predicts the same behavior from the object resisting gravity (gyro) and the object succumbing to gravity (pendulum). The Earth's oceans are not an exact "egg" because of land masses. Other planets have exact "egg" masses of water. When we look really far away, through a telescope or microscope, the theories break down. Molecules larger than mountains within neutrino stars or super-symmetric z-bosons tell us that our math and science are fundamentally wrong to begin with. Google sea level variances, sea level is not one thing.