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5 Billion years ago birth of the solar system
More than 10 billion years since the universe exploded into existence from nothing. -
4.6 BYA The earth began to form
The earth slowly started forming. -
3.8 BYA Evidence of Life
Singled- celled bacteria are the oldest living organisms. -
3.7 bya Photosynthesizing Bacteria
Microbes thrive in an oxygen free enviroment. -
3.5 BYA Oldest Fossils
The fossils usually appear offshore. -
2.2 BYA Oxygen
Oxygen appears in the envoronment, causing damage to living tissues. -
800 mya major glaciation period begins
The first of four global ice ages sets in. -
1.8 BYA Oldest eukaryote fossils
The oldest definition fossils date back to 1,800 mya. -
600 Protective ozone layer in place
Life on earth has been restricted to the oceans. -
480 mya Gondwana Forms
It is the southern hemisperes landmass. -
400 mya Oxygen nears present day levels
Oxygen nears 21% by volume of the atomosphere. -
350 mya They are prone to flooding
Carbon sinks forming "coal forests". -
250 mya Late triassic
90% of marine invertebrate genera go extinct. -
220 mya mammels, crocs, dinos
Most of these things go extinct. -
200 mya The pongaea breaks apart
Pangaea starts to break apart. -
65 mya End cretaceos
About 60-80 precent of all species go extinct. -
60 mya Primates
Primates evolved million years earlier. -
5.2 Whales
Features appearent early whale fossils. -
100,00 years Modern Humans
In the late pieistocene humans began to disperce throughout Africa.
