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<span>1. Precambrian Times (Most Ancient)</span> <p>All time before life existed, Earth was still a volatile environment, though the origins of life came around during this period.</p> <ul><li><a href="/10/1_first_life.htm">Origins of Life on Earth</a> </li> <li><a href="/10/2_first_life_earth.htm">First Life on Earth</a> </li> <li><a href="/10/3_development_organelles.htm">Cell Development & Diversification</a></li> </ul><span>2. Cambrian Period</span> <p>The development of multi-cellular organisms, including sponges, primitive animals and various plant life, diversifying from old species</p> <ul><li><a href="/10/4_multi_cellular.htm">Multi-Cellular Organisms</a> </li> <li><a href="/10/5_primitive_animals.htm">Primitive Animals</a></li> </ul><span>3. Ordovician > Permian Periods</span> <p>The transition from primitive species to specialised organisms, the increasing of genetic diversity via sex, and the transition from sea to land</p> <ul><li><a href="/10/6_arthropods.htm">Arthropods</a> </li> <li><a href="/10/7_insecta.htm">Arthropoda - Insecta</a> </li> <li><a href="/10/8_Fish.htm">Fish</a></li> </ul><span>4. Triassic / Jurassic Periods</span> <p>The arrival and dominance of dinosaurs in the air, land and sea, and how they developed from their ancestors and the causalities of their existence</p> <ul><li><a href="/10/9_amphibians.htm">Amphibians & Early Reptiles</a> </li> <li><a href="/10/10_dinosaurs.htm">The Dinosaurs</a></li> </ul><span>5. Cretaceous Period</span> <p>The removal of dinosaurs from planet Earth and the emergence of mammals and other more complex organisms</p> <ul><li><a href="/10/11_dinosaurs_succession.htm">Dinosaur Extinction</a> </li> <li><a href="/10/12_mammal_ancestors.htm">Mammals Ancestors</a></li> </ul><span>6. Tertiary Period</span> <p>The evolution of man and further diversification of all species to present date. The transition of Neanderthal man to modern man. </p> <ul><li><a href="/10/13_early_mammals.htm">Early Mammals</a> </li> <li><a href="/10/14_early_hominids.htm">The Hominids</a></li> </ul><span>7. Quaternary Period</span> <p>The evolution of man and further diversification of all species to present date. The transition of Neanderthal man to modern man, and how our dominance of planet Earth has directly shaped the future timeline of planet Earth.</p> <ul><li> <p><a href="/10/15_homo.htm">The Homo Species</a></p> </li> </ul>
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