An object or gasses mass is its entirety of volume and field mass emitted . We all know mass equates to energy and energy equates to mass. Can we assume energy is attracted to energy as mass is attracted to mass ? One assumes we can and in consideration of further thought , we've already discussed the "cold fusion" of atoms but have not mentioned heat energy being a sort of "anti-matter" , not in the traditional context of anti matter of course . We know when things are heated they expand , some things breaking their molecular bonds and showing anti-gravitational properties . In further consideration let's consider why mass is attracted to mass ! We know in physics of only one natural phenomenon of where things attract , this being the laws of opposite polarities . What happens when two opposite pole magnets join ? The fields remain and both fields will still attract a neutrally poled needle . Could we say that the neutrality of combined fields attracts the neutrality of the pin? Is the neutrality of mass attracted to the neutrality of other mass ? It would seem an apparent gravity mechanism .