Novel Consequences of Coexistence of Matter and Antimatter in Nature

In the present letter we discuss novel possible applications and implications of the formation of exotic atomic and molecular structures composed of particles and antiparticles. Particularly, we argue that huge amount of energy could be produced as a result of matter-antimatter cold fusion. Crucial questions raised concerning the fate of particles and antiparticles produced by the big bang are addressed. Assumptions of possible existence of two kinds of gravity and masses of different signs are proposed.