History of the earth By Daisy Liuuu Period: 3500 BCE to 3700 BCE First bacteria https://www.britannica.com/science/bacteria/Evolution-of-bacteria Period: 1000 BCE to 1700 BCE race animal fossils Period: 505 BCE to 530 BCE First fish Period: 438 BCE to 470 BCE Early land plants Period: 370 BCE to 400 BCE First amphibians Period: 310 BCE to 315 BCE First reptiles Period: 233 BCE to 243 BCE Dinosaurs appear Period: 210 BCE to 225 BCE First mammals Period: 150 BCE to 200 BCE First birds Period: 125 BCE to 140 BCE Flowering plants appear Period: 1 BCE to 2 BCE Earliest humans