Currently, Earth is in an interglacial period, which marked the beginning of the Holocene epoch. The site has produced abundant Salvadoran megafauna fossils belonging to the Pleistocene epoch. After nucleosynthesis ended, the universe entered a period known as the photon epoch. Tinamous first appear in the fossil record in the Miocene epoch. They lived during the Eocene epoch. This group became extinct at the end of the Early Cretaceous epoch. The earliest species of the family date back to the Oligocene epoch. Rochester's geography was formed by the ice sheets during the Pleistocene epoch. It defines the beginning of the current Meghalayan age in the Holocene epoch. Mid-latitude glaciation probably began before the end of the epoch. The Thirtieth Dynasty was the last native ruling dynasty during the Pharaonic epoch. The Holocene ( ) is the current geological epoch. The universal emergence of atomic hydrogen first occurred during the recombination epoch (Big Bang). It defines the start of the Northgrippian age in the Holocene epoch. Some of the most important craters used in lunar stratigraphy formed in this recent epoch.