The Fourth Dimension as it was explained to me as a lad (Punkadyne Labs (Punkwalrus))

This blew my mind when I was a kid, and influenced my thought process ever since then. This is totally worth 7 minutes 16 seconds of your time. You don't even have to be technical as long as you know what a "right angle" is. Posted in: 4th d1mension , flatland , sagan , science