The conversation between human and AI assistant.
Why is that Hudson Bay area of Canada has 4% less gravity than the rest of the world?
How exactly did the ice age cause such a phenomenon?
During the ice age, massive glaciers covered the Earth's surface, including the Hudson Bay area. The weight of the ice caused the Earth's crust to deform, creating a depression. This depression caused the gravitational force in that area to be weaker than in other areas.