
1. Hadean
1.1. - Formation of Earth (No Life)
1.2. - Chemical Evolution Theory - Vesicle Formation
1.3. NO era or period
2. Archean
2.1. - 1st Prokaryotes Photosynthesis
2.2. NO era or period
3. Proterozoic
3.1. Precambrian ERA
3.1.1. - 1st Eukaryotes (Single-celled) - 1st Multicellar Eukaryotes
3.1.2. Ediacaran PERIOD
3.1.2.1. - 1st Algae, Fungi, Sea Sponges, Cnidarians and other simple Soft-bodied Invertebrates
4. Phanerozonic
4.1. Paleozoic ERA
4.1.1. Cambrian PERIOD
4.1.1.1. - 1st Trilobites (Arthropods), Brachiopods, Ectoprocts, Mollusks, Corals, Echoniderms
4.1.2. Ordovician PERIOD
4.1.2.1. - 1st Jawless Fish - 1st Land Plants - Mass Extinction
4.1.3. Silurian PERIOD
4.1.3.1. - 1st Fish with teeth/jaws - 1st Land Invertebrates - 1st Vascular Plants
4.1.4. Devonian PERIOD
4.1.4.1. - 1st lobe-finned fish - 1st Insects and Tetrapods - 1st Amphibians - Mass Extinction
4.1.5. Carboniferous PERIOD
4.1.5.1. - Amphibians Dominate - 1st Reptiles - 1st Seed Plants (Gymnosperms)
4.1.6. Permian PERIOD
4.1.6.1. - Reptiles Diversify - Mass Extinction
4.2. Mesozoic ERA
4.2.1. Triassic PERIOD
4.2.1.1. - 1st Dinosaurs - 1st Mammals - Mass Extinction
4.2.2. Jurassic PERIOD
4.2.2.1. - 1st Birds - 1st Flowering Plants - Gymnosperms Dominate
4.2.3. Cretaceous PERIOD
4.2.3.1. - 1st Primates - Dinosaurs Dominate - Mass Extinction
4.3. Cenozoic ERA
4.3.1. Paleogene PERIOD
4.3.1.1. - Radiation of Mammals and Birds
4.3.2. Neogene PERIOD
4.3.2.1. - 1st Hominids
4.3.3. Quaternary PERIOD
4.3.3.1. - Ice Age (Large Mammal extinction) - Homo sapiens - Current Time (BSC1011C)