GENERAL KNOWLEDGE

Detailed explanation-1: -The history of the universe since the time of the Big Bang is divided into six epochs, corresponding to chaos, the hadron epoch, and the lepton epoch, which collectively make up the radiation era, and the atom epoch, the galaxy epoch and the stellar epoch, which make up the matter era.

Detailed explanation-2: -Before 1 Planck Time Before a time classified as a Planck time, 10-43 seconds, all of the four fundamental forces are presumed to have been unified into one force. All matter, energy, space and time are presumed to have exploded outward from the original singularity. Nothing is known of this period.