Hi all Another thought I have been pondering is why don't I weigh significantly more at the poles than I do at the equator The earth rotates at n kilometers per hour, I think around ~1300 kmph Would this not create a centrigual effect countering earths gravity. thus making me lighter at the equator than the poles where no real rotation is evident. I know the earth has an equatorial bulge. but to me. it seems to be a very small bulge, does this bulge increase the earths mass at the equator enough to counter the centrifugal forces. I read elsewhere pole to pole the earth is 22 km's less in diameter than at the equator. this seems marginal. And.. will the earth eventually flatten ? Chris H.