1. Hadean
1.1. No l ife on earth
1.2. Chemical evolution
2. Archaean
2.1. 1st Prokaryote
2.2. Photosynthesis
3. Proterozoic
3.1. Era:Precambrian
3.1.1. 1st Eukaryotes
3.1.2. 1st multicellular organisms
3.2. Period: Ediacaran
3.2.1. 1st Algae, fungi, sea Sponges/ Mollusks, Cnidarians (simple soft bodied invertebrates
4. Phanerozoic
4.1. Paleozoic
4.1.1. Cambrian
4.1.1.1. 1st Echoniderms, Mollusks, corals, ectoprocts, Brachiopods, 1st trilobites
4.1.2. Ordovician
4.1.2.1. 1st jawless fish, 1st land plants, extinction
4.1.3. Silurian
4.1.3.1. 1st fish with teeth/jaws, 1st land invertebrates, 1st vascular plants
4.1.4. Devonian
4.1.4.1. 1st lobe-finned fish, 1st insects and tetrapods, 1st amphibians, Mass extinction
4.1.5. Carboniferous
4.1.5.1. amphibians dominate, 1st reptiles, 1st seed plants (gymnosperms)
4.1.6. Permian
4.1.6.1. Reptiles, Diversity, Mass extinction
4.2. Mesozoic
4.2.1. Triassic
4.2.1.1. 1st dinosaurs, 1st Mammals, Mass Extinction
4.2.2. Jurassic
4.2.2.1. 1st birds, 1st flowering plants, Gymnosperms dominate
4.2.3. Cretaceous
4.2.3.1. 1st Primates, dinosaurs dominate, Mass Extinction
4.3. Cenozoic
4.3.1. Paleogene
4.3.1.1. Radiation of mammals and birds
4.3.2. Neogene
4.3.2.1. 1st Hominids
4.3.3. Quaternary
4.3.3.1. Ice age (Large mammal extinction), Homo sapiens, The Covid 19 Pandemic