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Earliest Fossil Bacteria
Date: 2,500,000 BC
What is beleived to be the first fossil bacteria, start showing up on earth. This is the first major event in the creation of life. -
Period: to
Precambrian era
Date: Somewhere between 3,500 million years ago to 1,000 million years ago. -
Origin of O2 by photosynthesis
This is where water came in to being on the earths surface. Photosynthesis is what brought water to earth. -
First Eukaryotes
Date: 1,500 million years ago
The first eukaryotes started to apperar in the oceans of earth. This would later lead to the creation of animals and plants as well as life on land. -
Earliest multicellular organisms
Date: about 700 million years ago
Finally the first multicellular oganisms emerge from the oceans of earth. This is a major evolutional step in the creation of life. -
Diverse Protists
Date: 1,000 million years ago
Protists branched out from the first eukaryotes and became their own category. They are still living underwater at this point, and undergoing photosynthesis. The photosynthesis aids in the process of creating oxygen. -
Period: to
Cambrian period
Date: about 600 million years ago to 500 million years ago -
Orgin of all major animal phyla
Date: 510 to 500 million years ago
This is the origin of where all the animal phyllums started to speciate. -
First Jawless fish
Date: 510 million years ago
The first jawless fish appear. They are able to slither through the water and this shows the first sign of evolution of limbs. -
Period: to
Ordovician
Date: 500 million years ago to 540 million years ago -
First mass extinction
Date: 440 million years ago
This is the first mass extinction where all the animals and other organisms are wiped out. Life now must start again. -
Period: to
Silurian period
Date: 445 to 405 million years ago -
Plants and arthropods invade land
Date: 430 million years ago
Land has a new friend: the plant. Plants as well as arthropods start to take their rightful place on land. -
Period: to
Devonian period
Date: about 407 to 360 million years ago -
Bony fishes become abundant
Date: 400 million years ago
The first bony fishes have now started to spread throughout the entirety of earths oceans. This will eventually evolve into animals with backbones. -
Early Amphibians evolve
Date: 370 million years ago
The first amphibians evolve from the first bony fish. Amphibians are now on land. -
Second mass extinction
Date: 360 million years ago -
Period: to
Carboniferous period
Date: 360 million to 280 million years ago -
Early Reptiles
Date; 350 million years ago
The first reptiles started to evolve out of the earlier amphibians and now are leaving the oceans. They can lay their eggs on land now as opposed to laying them in the water. -
Period: to
Permian period
Date: 290 to 250 million years ago -
First dinosaurs and mammals
Date: 240 million years ago
The first dinosaurs and mammals start showing up on land evolved from the previously existing reptiles and amphibians. -
Period: to
Triassic period
Date: 250 to 210 million years ago -
Fourth mass extinction
Date: 200 million years ago -
Period: to
Jurassic period
Date: 200 to 150 million years ago -
Period: to
Jurassic period
Date: 200 to 150 million yeasr ago -
Period: to
Cretaceous period
Date: 150 to 70 million years ago -
Appearance of the first flowering plants
Date: 120 million years ago
The appearance of what is beleived to be the first flowering plants occured. -
Fifth mass extinction
Date: 70 million years ago -
Period: to
Tertiary period
Date: 60 to 5 million years ago -
Birds and Mammals spread
Date: 60 million years ago
Birds and mammals have now evolved enough to the point whwere thay can start to spread and populate the earth. -
Mammals abundant on land
Date: 20 million years ago
Mammals have now become abundant and have spread throughout the planets ecosystems. -
Period: to
Quaternary period
Date: 9 million years ago to present -
First Homo Sapiens
Date: about half a million years ago
