Devonian Period

The Devonian Period, occurring about 419 to 359 million years ago, is often called the "Age of Fishes" because of the diverse and abundant marine life, including early sharks and armored fish. During this time, significant evolutionary milestones happened, such as the first appearance of insects, first forests with trees, and the evolution of early tetrapods—vertebrates that started moving onto land. The period saw major geological changes, like the formation of many landmasses and mountain ranges. It was a crucial time for life’s diversification, laying groundwork for later terrestrial ecosystems.