as far as the universe is concerned, the theory of everything is solved. Because the universe uses this theory to keep itself alive. This is the plasma theory of cold fusion. To understand hot and cold fusion is to understand a theory of everything. For a theory of everything can explain the true meaning of temperature and its intimate relationship with energy and matter and also of space and time. Entropy is defined classically as the change of heat energy over the temperature and infinite entropy happens at the time when the temperature is zero. Modern definition is given as a measure for the disorderness of a system
http://scienceworld.wolfram.com/physics/Entropy.html