* Lasted from about 360 million years ago to about 300 million years ago.

* Characterized by a warm and humid climate, with lush forests and swamps covering much of the Earth's surface.

* The evolution of amphibians and the first reptiles.

* The appearance of the first seed plants, including ferns and gymnosperms.

* The formation of vast coal deposits, which are used today as a source of energy.

Devonian period

* Lasted from about 420 million years ago to about 360 million years ago.

* Characterized by a warm and dry climate, with deserts and grasslands covering much of the Earth's surface.

* The evolution of fish, including the first jawed fish.

* The appearance of the first amphibians, which were able to live both in water and on land.

* The formation of extensive coral reefs.