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Earth's gravitational field is subject to variations that occur over time. This is due to a combination of factors, such as the uneven distributions of mass in the oceans, continents, and deep interior, as well as climate-related variables like the water balance of continents, and the melting or growing of glaciers. And now, for the first time ever, these variations have been captured in the image known as the "Potsdam Gravity Potato." [Source: Universe Today]
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