Paleozoic

The Paleozoic Era is a major period in Earth's history that lasted from about 541 to 252 million years ago. During this time, life on Earth saw significant changes, including the rise of the first complex plants, insects, and animals, with early vertebrates like fish appearing in oceans. It was marked by several large-scale events, such as the formation of supercontinents and the most extensive mass extinction at the era's end, which led to the disappearance of many species. The Paleozoic set the foundation for the development of many ecosystems that exist today.