I don't think it is possible that anyone could. For either. How can you expand space into a 4th dimension when no-one has seen what it would look like, and because it is so unfathomable, how can anyone imagine what it might look like on their own. I think the same applies for time. Although you cannot see time (and although personally i feel that it does not exist), such a way as to image it would be extra-ordinary. Would a second dimension of time run ahead or or behind our current dimension so we can travel forwards or backwards in it. Or would create this "parallel universe" where everything happens at the same time as it does in this one, and there is another "me" out there.
