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5 More Fascinating Facts about Planet Earth

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The Rate Of Gravity Is Not Constant


You’d think gravity would have an equal effect everywhere in the world, but it doesn’t. For example, the Hudson Bay area of Canada has a weaker gravitational pull than most places on Earth. The change is so miniscule, you’d never feel it, but modern technology can detect it.

We only have theories as to the cause. The most common theory points us to the Ice Age. When the land-depressing Laurentide Ice Sheet melted, it left an imprint that hasn’t sprung back, affecting gravity to a slight degree.

This ice sheet covered most of Canada and part of North America and would have been heavier in certain areas than in others. The same thing has happened at the South Pole.

Ice melting in recent years has caused a definite shift in local gravitational pull. Distribution and density of land, ocean activity, and natural processes can make a difference in the rate of gravity. An earthquake in Japan led to a quickly detected change in 2011—not that anyone could feel it.

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