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Formation of Earth
4.6 Billion Years ago -
Intense Volcanic Activity & Formation of Earth's Crust
4.5 Billion Years Ago -
Cooling, Meteorite Bombardment & Great Electrical Storms
4.2 Billion Years Ago -
Oceans Formed
4 Billion Years Ago -
Formation of Organic Molecules
3.9 Billion Years Ago -
Period: to
Precambrian Era
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Oldest Known Rocks & Oldest Known Chemical Evidence of Life
3.8BYA -
Oldest Known Rocks and Oldest Known Chemical Evidence of life
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Oldest Known Rocks & Oldest Known Chemical Evidence of Life
3.8 BYA -
No Free Oxygen in the Atmosphere
3.7 BYA -
No Free Oxygen in the Atmosphere
3.7BYA -
No Free Oxygen in the Atmosphere
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Complex Amino Acids Formed
3.6 BYA -
Complex Amino Acids Formed
3.6BYA -
Complex Amino Acids Formed
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Oldest Known Evidence of Life--Archea-like Protists
3.5 BYA -
Oldest Known Evidence of Life--Archea-like Protists
3.5BYA -
Oldest Known Evidence of Life--Archea-like Protists
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First Evidence of Land Continents
3.4 BYA -
First Evidence of Land Continents
3.4BYA -
First Evidence of Land Continents
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Abundant Archea-like Organisms--Prokayotes
3.2BYA -
Abundant Archea-like Organisms--Prokayotes
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Coral, Jellyfish, Sponges, and Worms Present in the Sea (Invertibrates)
1 Billion Years Ago -
Cambrian Explosion of Marine Organisms--Trilobites
570 Million Years Ago -
First Blue-Green Algae--Stromatolites
3BYA -
Oldest Known Chemical Evidence of Eukaryotes
2.7BYA -
Ozone Layer Forms
2BYA -
Period: to
Precambrian Era
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Abundant Bacteria
1.8 Billion Years Ago -
Oldest Known Fossils of Eukaryotes (Protists)
1.7 Billion Years Ago -
Oldest Known Fossils of Eucaryotes
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Formation of Early Super Continent-Pangea I
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Formation of Early Super Contintent--Pangaea I
1.25 Billion Years Ago -
First Multicelled Animals--Jellyfish
1.2 Billion Years Ago -
First Multi-Celled Animals (Jellyfish)
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Central U.S. in an Ocean (off and on)
1.1 Billion Years Ago -
Central US in an Ocean (off and on)
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Coral, Jellyfish, Sponges, and Worms present in the sea. (inverterbrates)
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Breakup of Early Super Continent
580 Million Years Ago -
Period: to
Paleozic Era
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Oldest Known Fish--Vertebrates
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Oldest known land plants & oldest known jared fish
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Fungi and modern algae appear
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Oxygen Reaches 20%--Present day level
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Oldest known insects
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First amphibian
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Oldest Known Forest with Tall Trees
360 MYA -
Oldest Known Reptiles
350 MYA -
Oldest Known Reptiles
350 million years ago -
Giant Ferns and First Seed Plants
310 MYA -
Giant ferns and first seed plants
310 million years ago -
Coal Age--Warm, Swampy, Primitive Land Plants
305 MYA -
Coal Age--Warm, Swampy, Primitive Land Plants
305 million years ago -
Super Contintent Panagea II Formed
280 MYA -
Super Contintent Panagea II Formed
280 million years ago -
Mass Extinction of Sea Creatures--Trilobites
250 MYA -
Mass Extinction of Sea Creatures--Trilobites
250 million years go -
First Dinosaurs and Oldest Known Egg-Laying Mammals
220 MYA -
Continents Separate
210 MYA -
First Birds
180 MYA -
Oldest Known Flowering Plants
It has been 130 MYA since this has happened -
Oldest Known Flowering Plants
130 MYA -
Oldest Known Primate
60 MYA -
Oldest Known Primates
60 million years ago -
India Collieds with Asia Producing the Himalayes
50 MYA -
India collides with Asia producing the Himalayas
50 Million years ago -
First Monkey- like Primates
35 MYA -
First Monkey Like Primates
35 Million years ago -
Worldwide Glaciations
1.6 MYA -
Early Humans
1.5 MYA -
Worldwide Glaciation
1.6 Million years ago -
Early Humans
1.5 Million Years Ago