We propose that the QCD vacuum pion tetrahedron condensate density may vary in space and drop to extremely low values in the Kennan, Barger and Cowie (KBC) void in analogy to earth’s atmospheric density drop with elevation from earth. We propose a formula for the gravitation acceleration based on the non-uniform pion tetrahedron condensate. The MOND acceleration limit may be due to the extremely low pion tetrahedron condensate density at the galaxies’ edges. Gravity may be due to the underlying microscopic attraction between quarks and antiquarks, which are part of the vacuum pion tetrahedron condensate. We propose an electron tetrahedron model, where electrons are comprised of tetraquark tetrahedrons, du ̃d ̃d and du ̃u ̃u. Two quarks determine the charge and two quarks determine the spin state. The electron tetrahedron and the pion tetrahedron condensate may perform high frequency quark exchange reactions by tunneling through the condensation gap and form a delocalized electron cloud with a fixed spin state. The pion tetrahedron may act as a "QCD glue" bonding electron pairs and protons and neutrons in the nuclei with opposite spins. The central roles of antimatter and the non-uniform pion tetrahedron Aether were not anticipated by general relativity and quantum mechanics and are not fully understood still.