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The idea of time as a spatial dimension has some roots in reality, as time is recognized by RealLife physicists and theoreticians as being closely tied to the dimensions of space, but not as a physically identical dimension. Additionally, string theory posits that there may be as many as ''eleven'' spatial dimensions that we just haven't evolved to perceive due to our inability to interact with them--a common (and very limited, but go with it for now) analogy is to imagine an ant that can only travel in two dimensions (barring its ability to climb up things, an ant cannot jump or fly), so the ant has naturally evolved to perceive the universe as two-dimensional.
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The idea of time as a spatial dimension has some roots in reality, as time is recognized by RealLife physicists and theoreticians as being closely tied to the dimensions of space, but not as a physically identical dimension. Additionally, string theory posits that there may be as many as ''eleven'' spatial dimensions that we just haven't evolved to perceive due to our inability to interact with them--a common (and very limited, but go with it for now) analogy is to imagine an ant that can only travel in two dimensions (barring its ability to climb up things, an ant cannot jump or fly), so the ant has naturally evolved to perceive the universe as two-dimensional.
two-dimensional.[[note]]Also, most if not all of these speculated dimensions are also believed to be ''very'' small (smaller than a Planck length) and curled up, meaning that even if we could perceive them there wouldn't really be much we could do with them.[[/note]]
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-->'''Ford''': Normally, human beings see landscapes of space, successive slices of time, and only one of slice quantum uncertainty. Rhinoceroses see landscapes of time[[note]]As explained elsewhere in the programme, and in ''Last Chance to See'', because smell is more important to rhinos than than sight, and odours fade away more gradually than photons do[[/note]]. Cats, I believe, see landscapes of quantum uncertainty.
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-->'''Ford''': Normally, human beings see landscapes of space, successive slices of time, and only one of slice quantum uncertainty. Rhinoceroses see landscapes of time[[note]]As explained elsewhere in the programme, and in ''Last Chance to See'', because smell is more important to rhinos than than sight, and odours fade away more gradually than photons do[[/note]]. Cats, I believe, see landscapes of quantum uncertainty.
