nostr:npub1ue84a9qckwkrfunjap2rh7gzdm7wsvzpcg7ux8nxtr6qsdy4rtrs4245vs - Until about 47,000 years after the Big Bang, most of the energy was in the form of radiation - that is, particles moving at the speed of light or close to it, namely photons and neutrinos.  This is called the "radiation dominated era".  Eventually this radiation was either absorbed by matter or was set free as the cosmic background radiation we see today (stretched out by the expansion of universe, so mostly microwaves now).  

But the dominance of matter over antimatter must have started much earlier, because the radiation was only energetic enough to turn into quark-antiquark pairs (and be formed by them) for roughly the first 50 microseconds after the Big Bang.   After this, radiation would form (and be formed by) lighter things like electron-positron pairs, etc.