We propose that the exotic meson tetraquark introduced in previous papers, may be a condensed pseudo-Goldstone boson in a compact bound state having a tetrahedron geometry. The transition from two free mesons to the tetrahedron state may be seen as the Goldstone theory symmetry breaking. We note that the QFT quantum harmonic oscillator zero-level does not describe the non-empty QCD ground state and that the QCD tetrahedrons may be a better description of the QCD ground state. We assume that electrons and positrons are composite particle charged mesons. We propose that the QCD tetrahedrons play a central role in the electron pairing mechanism in both molecules and superconductors. We suggest that the cosmological redshift may be alternatively, or in addition to, due to the QCD tetrahedron density variations in space and particularly due to its density reduction in the cosmic web great voids.