The conversation between human and AI assistant.
Earth is circular, so how does water remain in its place rather than falling?
Interesting. So does that mean that water at the equator is being pulled differently than water at the poles?
Yes, actually! Because the Earth is slightly elliptical and not a perfect sphere, the gravitational pull is stronger at the poles and weaker at the equator. This causes the water to bulge slightly around the equator, which is why the Earth is not a perfect sphere.