Question

what are the three main eras of earth history called

Answer 1

Paleolithic age
Mesolithic age
Neolithic age} Prehistory
There are many ages defined
Be more specific, please.

Answer 2

Pre-Cambrian EraEarth formed and became a planet 600-3,300 million years agoPaleozoic EraAncient life.Volcanoes and mountains formed. Age of marine vertebrates. Land vegetation. Amphibians and reptiles. 230-600 million years ago.Mesozoic EraMiddle life. Mammals and birds appear. Dinosaurs were dominant. Plants adjusted to seasonal changes. Continents shifted. 63-230 million years ago.Cenozoic EraPresent life. Mammals are dominant. Birds and fish evolve. Raw materials came into existence- oil, gas, coal, and metallic minerals were formed. Recent times-63 million years ago.