Physics cares about physical reality again! Mathematics can help to correlate the hows and eliminate the impossibles in physics. Papers/articles are flooded with equations, but can seldom unveil the fundamental level. Conceptual comparison tables can clarify the whats at the fundamental level. First time so fundamental in physics! Here comes the conceptual comparison tables! Readers, be an early bird to add something for the long-sought Theory of Everything! Curvature of space as the building material! A new 4D space framework has been established to replace the 10D spacetime (10 dimensions will sooner or later be found to be more than necessary). As you know, the study upon higher dimensionality is a hot topic in physics, especially in string theories. A century ago, physicists reformulated classical physics into modern physics. Special relativity provides a shortcut of mathematical spacetime configurations that also apply to quantum mechanics. However, some people say that the physical reality has been lost. Mathematical satisfaction makes scholars indifferent to the hidden physical reality practiced by Nature. Please view Natural Physics vs. Unnatural Physics http://www.grandunifiedtheory.org and be an early bird in unveiling the Ultimate Reality of our physical world. For the new framework of physics, please write something on our guestbook or reply with e-mail. Best wishes. Respectfully yours, WU Chi-Kay model developer