Potato
So the BBC has a cool article on this gravity map of the Earth. You might expect that since the Earth isn't a completely homogeneous lump of a single material, but instead consists of massive plates floating around on convecting blob of molten rock and iron and such, that gravity wouldn't be exactly the same everywhere you stood, rock and iron and water all having different densities and all.
My dad's friend Jim (How is it possible that Jim has no web presence, having kept me interested in physics and computers since I was wee...?) says he used to worry about this kind of thing when he was flying satellites for NASA; the orbits would get slightly screwed up when they flew over one of the parts with stronger or weaker gravity than normal, and they'd need to preemptively nudge the satellite up or down to compensate. Apparently the gravity map was less precise back in the day. Bitchin picture, huh?
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Cord
Obviously an idiot.
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