When were the first black holes formed? How long after the big bang until black holes could form?
It is also possible that in the first seconds of the universe, micro-black-holes were formed, but they would have disappeared soon afterwords.
Remember that you start out with only fundamental particles, then protons, neutrons and electrons... and basics you're left with only those for a hundred million years (until the first stars are formed). Still, in the first small fractions of seconds, the energy of these particles were large enough that they could collide with eachother---creating energy densities high enough to form a micro-black hole (with total mass roughly on the order of a proton or so).Why would black holes formed in the first few seconds be micro in mass? Would any be macro in mass? What is the physics that makes early black holes only micro?