Quote:
Originally Posted by pretmaker
Time is relative. Time can be stretched and shrunken relative easilly.
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Not necessarily. Time is relative to space, this is true. But it takes quite a lot to try to bend time, for example a space pod that can travel the speed of light could conceivably travel to the future 60 years in but a few minutes. But how many of those space pods do you own? Then there is gravity. And cosmic string theory. And quantum singularities (black holes). Etcetera. Etcetera.
Quote:
Originally Posted by chimpzy
Similarly, let's assume that the 4th dimension is time, like in the video. Now imagine a being that moves in the 4th dimension, what we could call a time traveller. From our point of view, when this being moves into our current moment of time and then leaves, it seems to come in and out of existence too.
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Exactly. From our perspective, a 4th dimensional being would be able to travel back and forth through time, and if appearing in our reality (if we could see it), such a person would
seem to fade in and out of existence like you said. Physics in the dimensions seem very bizarre when viewed from their respective perspectives. Ever see a hypercube? It's just a simple box in the fourth dimension.
