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What a daft picture and equally daft accompanying statement .... The centre of the Earth is the centre of it's gravity - the further away from the centre of the earth the less the effect of gravity - can be easily proven - was on TV a few years ago - students weighed themselves at the top of Mt...

I watched a documentary series a while back on suspension bridge building. Can't remember which bridge it was now, but the two support pylons were built exactly upright but about 800 metres apart. So, why, were the tops 30cm further apart than the bases when measured by laser? I'm sure those...