The time traveller proceeded, "any real body must have extension in four directions: it must have Length, Breadth, Thicknessa and Duration. But through a natural infirmity of the flesh, which I will explain to you in a moment, we incline to overlook this fact. There are really four dimentions, three which we call the three planes of Space, and a fourth, Time.
( H.G. Wells )
[ The Time Machine ]
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