  We propose a non-exotic electromagnetic solution (within the standard model
of particle physics) to the cosmological 7Li problem based upon a narrow 2 MeV
photo-emission line from the decay of light Glueballs (LGBs). These LGBs form
within color superconducting, tens of Fermi in size, quark clusters (SQCs) in
the radiation-dominated post-BBN epoch. The mono-chromatic line from the LGB ->
gamma+gamma decay reduces Big-Bang nucleosynthesis (BBN) 7Be by 2/3 without
affecting other abundances or CMB physics, provided the combined mass of the
SQCs is greater than the total baryonic mass in the Universe. Following the LGB
emission, the in-SQC Quantum-ChromoDynamics (QCD) vacuum becomes unstable and
"leaks" (via quantum tunnelling) into the external space-time (trivial) vacuum
inducing a decoupling of SQCs from hadrons. In seeking a solution to the 7Li
problem, we uncovered a solution which also addresses the dark energy (DE) and
dark matter (DM) problem making these critical problems intertwined in our
model. Being colorless, charge neutral, optically thin and transparent to
hadrons, SQCs interact only gravitationally making them a viable CDM candidate.
The quantum tunnelling of the in-SQC QCD vacuum to the trivial vacuum offers an
explanation of DE in our model and allows for a cosmology which evolves into a
LambdaCDM universe at low redshift with a possible resolution of the Hubble
tension. Our model distinguishes itself by proposing that the QCD vacuum within
SQCs possesses the ability to tunnel into the exterior trivial vacuum,
resulting in the generation of DE. This implies the possibility that DM and
hadrons might represent distinct phases of quark matter within QCD,
characterized by different vacuum properties. We discuss SQC formation in
heavy-ion collision experiments at moderate temperatures and the possibility of
detection of MeV photons from LGB -> gamma+gamma.
