[ad_1] The Devonian Period, part of the Paleozoic Era, saw the evolution of fish with legs, the emergence of insects and spiders on land, and the first true forests. Calcareous algae and coral-like stromatoporoids built large coral reefs, but a mass extinction wiped them out. The cause of the extinction is unknown. The Devonian Period […]
[ad_1] The Devonian period lasted 57 million years and was characterized by diverse fish species, including the first known vertebrates with jaws (acanthodians) and heavily armored placoderms. Vascular plants enabled the first true forests and soils, and lobe-finned fishes began to develop legs towards the end of the period. The Devonian period is a geological […]
