In the Elegant Universe, on page 129, first paragraph, it says ""...ultramircoscopic examination of space (and time)---it describes an unfamiliar arena of the universe in which the conventional notions of left and right, back and forth (and even of before and after) lose their meaning." of course, this is illustrating quantum foam. When Greene says that the meaning of "before and after lose their meaning", does he mean that before and after occur at different times, so to speak? Like, after would happen before before? Of course, that doesn't make any sense at all...but this is quantum mechanics. It doesn't make any [common] sense. I am sure my understanding of it is incorrect( because it violates laws stated in thermodynamics; Entropy is only in one direction). I would like some clarification please.