Paleozoic
geo:time:era:paleozoicPaleozoic Era (538.8–251.9 Ma): explosion of animal life in seas; colonisation of land by plants, invertebrates, and vertebrates; ends with largest mass extinction in Earth history.
Paleozoic Era (538.8–251.9 Ma): explosion of animal life in seas; colonisation of land by plants, invertebrates, and vertebrates; ends with largest mass extinction in Earth history.