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the strength of earth's gravity is known due to many factors such as the way rocks have been deposited
Quote from: Tim the Plumber the strength of earth's gravity is known due to many factors such as the way rocks have been depositedMineral prospectors use [not allowed to post external links. In a science forum???] to measure the surface gravity, to infer subsurface features.The differences in gravity due to rocks on the Earth today are fairly subtle - they are measured as fractions of a unit called the "gal" (after Gallileo), which is 1 cm/s2.These variations are very small compared to typical surface gravity, which is about 10 m/s2.So this won't cause detectable variation in the size of animals today.