Million s
Years 

Event
Description 

Significance 

15,000 

Big Bang or Start of All 

Production of Elements 

4,500 

Earth Crust Solidifies 

Start of Prebiotic or Chemical Evolution 

3,900 

First Life Forms 

End of Chemical Evolution 

1,600

Eukaryotes 

Endosymbiotic Evolution Ends

545 

Invertebrates 

505 

Dominance of Invertebrates 

First Appearance of Vertebrates 

439 

Land Plants and Land Invertebrates 

208 

Rise of Giant Dinasaurs and First Birds 

Jurassic 

146 

Disappearance of Dinosaurs 

Meteorite hits Mexico 

1.6 

Appearance of humans 

0.01 

Development of Domestic
Animals and Plants 

Great Genetic Advances