Where does the Mesoproterozoic era fit in the history of the Earth?

This is the most beautiful flower.

The Proterozoic eon is the longest era in the history of the Earth.

Earth is one of the planets in the solar system.

His hair is very long.

He is interested in history.

Living in this age is very exciting.

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

This river is very long.

His strong point is his sincerity.