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Planets form (5 bya)
Forms from planets interstellular gast and dust -
Earth began to form (4.6 bya)
Earth began to form -
Bacteria diversy (3.8 bya)
Undistured volcano rock -
Photosynthesizing bacteria (3.7 bya)
Microscopes produce energy -
Oldest fossils (3.5 bya)
Land chunks collide to form earliest continents. Domed shape formations bacteria forming -
Oldest eukaryote fossils (1.8)
Single celled algae growing bacteria forming -
Major glaciation period begins (800 mya)
Ice age from orbit of earth and spin -
Protective ozone layer in place (600 mya)
Ozone layer in place -
Land plants (480 mya)
Green algae wash ashore adapt -
Oxygen nears present day levels (400 mya)
Oxygen nears present day levels -
Repitles (350 mya)
Reptiles with similar skeleton -
End permain (250 mya)
90% of all species -
Dinoasaurs mamals and crocodiles (220 mya)
Mamals, dinosaurs, and crocodiles -
Pangaea starts to break apart (200 mya)
Deap heat causes rift valleys between continents -
Tropical climate extends to plar regions (65 mya)
60-80% of all species go extinct -
Primates (60 mya)
Primates evolved lemar to gorilla -
Hominids (5.2 mya)
First known homins human like forms -
Modern humans (100,00 years)
Modern humans despirse through africa
