Are tesseracts and hyperspheres ‘time’? Or is it completely different?
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No, time is its own dimension. We know time is unique because it only flows in one direction, whereas you can travel either direction in either dimension of space. This is what makes it a spacial dimension.
People called time “the 4th dimension” but our universe has 3 spatial dimensions and 1 time dimension, that’s where you get the title of 4th.
String theory (which isn’t experimentally proven, so it should be the string hypothesis) suggests 10 spacial dimensions and 1 time dimension, but physics is moving away from this idea.
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