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: -c. 0 seconds (13.799 ± 0.021 Gya): Planck epoch begins: earliest meaningful time.

Detailed explanation-3: -From examining these fossils, scientists know that certain organisms are characteristic of certain parts of the geologic record. The study of this correlation is called stratigraphy. Officially, the current epoch is called the Holocene, which began 11, 700 years ago after the last major ice age.