The Mesoarchean eon is a part of Earth's history, which lasted from about 3 billion years ago to about 2.8 billion years ago.

This is the most beautiful flower.

The Archaean eon is the oldest era in the history of the Earth.

He is interested in the history of the past.

This old building tells the history of our town.

This old house is the one where my grandparents lived.

Earth is one of the planets in the solar system.

He is interested in history.

Living in this age is very exciting.

The Mesolithic is the era between the Paleolithic and the Neolithic.