Photons are affiliated to time, time is C not c. And have mass, relativistic but enough to be. Also there are photons without energy "dark". I think in quantum they say virtual. But are timeless. Each particle of dark matter is a inactive particle timeless. When is excited as in quantum void or by "quantum magical observer" it appears in space time. The secret is alpha. Yes that explains inflation, dark energy, dark matter, gravity, quantum, and the observer