Here's another piece of the same puzzle. Because of the way we are accustomed to perceiving physically, we persist in the belief that time and space are contiguous and continuous. Also, we believe they are profoundly uniform -- one instant of time is only different by the event in it, but the time itself is just like its predecessor; space is non-discrete and when you get tot the end of some and look out, there's more, alla same except for contents.

At Planckian scales, these certainties, too, slip away. This article on the subject raises more questions than it answers, though. Like the true nature of in-between, for example.

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