1) Do photons eventually run out of energy and stop producing light? 2) If atoms are non-solid and more than 99% empty space, what is the photon illuminating when it hits a surface? 3) What is the actual light being produced, as opposed to the photon producing it? 4) is it possible for a Higgs boson to grant a photon mass? 5) Do photons have a lifespan? 6) Scientists recently crystallized light. How is this possible if photons are massless?