For every one billion anti-matters in the universe, there needs only one billion and one matter particle counter-parts to create the universe today. Don't we also know that they annihilate into photons? Following that logic, can't we assume 2billion/(2billion+1) is the percentage of energies carried by photons in the universe? Photon's can't decay can't they? They do collide and create matter and anti-matter pairs, but what are the chances of that and the percentage of that happening. The universe is also expanding, so as time goes by, the likely hood of colliding photons are decreasing not increasing. Moreover, pairs of matters and anti-matters created this way would be likely be annihilated again, into photons. Now, there is a model saying there is 4-5% of visible matters that we understand, and 23% are dark matters while the rest are dark energies we don't understand. Does this 4-5% include photons? If yes, why is it so low when we knew matters and anti-matter annihilated each other into photons in the early universe? Isn't energies carried by photos included into this 4-5% of known universe? If no, how is it even possible to have 4% given only 1/2,000,000,001 matters didn't annihilated long time ago.