4.6 MY-Jan. 1-Earth is born! Feb. 25-Life Evolves Mar. 28-Prokaryotes Jul. 25-Eukaryotes Nov. 18-Life diversifies, and invertebrates arrive! Nov. 22-First vertebrates and algae dominant. Then, Extinction! Nov. 28-First land plants and jawed fishes Dec. 1-Extinction II Dec. 2-First amphibians Dec. 5-First reptiles and seed plants. Coal deposits form Dec. 8-Conifers dominate Dec. 11-First dinosaurs Dec. 12-Extinction III Dec. 14-First birds, mammals, and flowering plants! Also, Extinction IV Dec. 29-Flowering plants dominant Dec. 31-Extinction V, first placental mammals, and humans evolve!