Entropy and its relationship to allometry
  Researchers have found that the metabolisms of organisms appear to scale proportionally to a 3/4 power of their mass. Mathematics in this article suggests that the capacity of an isotropically radiating energy supply scales up by a 4/3 power as its size (and therefore the degrees of freedom of its circulatory system) increases. Accordingly, cellular metabolism scales inversely by a 3/4 power, likely to prevent the 4/3 scaling up of the energy supply overheating the cell. The same 4/3 power scaling may explain cosmological dark energy. 
Robert Shour