5 yo: Look, that's SLAC. It's a mile long. 2 yo: A mile long? I'm impressed!
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@paulg you should to them they had to account for the curvature of the earth while building it.
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@paulg every 20m the earth falls 3mm so they needed take that into account for accuracy rather than level with respect to gravity.Thanks. Twitter will use this to make your timeline better. UndoUndo
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