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4600 BCE
Earth is formed
About 4,600 million years ago the earth began to form when a collision between disc-shaped clouds, soon the dust and gas clumped together to for Earth -
3800 BCE
1st eukaryotes
First form of eukaryotes was seen 3,800 million years ago creating larger bacteria organisms -
3500 BCE
1st multicellular life
Life first began to be seen about 3,500 million years ago in small microscopic organisms -
900 BCE
Oxygen enters atmosphere
Oxygen first was brought to the atmosphere by a bacteria giving off oxygen from photosynthesis -
438 BCE
Ordovician extinction
One of the many major mass extinctions first occurred wiping out most life -
360 BCE
Devonian extinction
Mass extinction occurred shortly after Ordovician and created new ways to form life -
270 BCE
Pangea formed
Earths land mass was once all connected and the formation was about 270 million years ago -
245 BCE
Permian extinction
Extinction mainly affected first forms of life in first reptiles -
206 BCE
Triassic extinction
Extinctions of first species of dinosaurs -
200 BCE
Pangea begins to breakup
The land formation began to swept are and form continents -
100 BCE
Cretaceous extinction
One of the most impacting extinctions which killed all forms of dinosaurs -
20 BCE
Homo sapiens evolved
Humans first evolved and was from evolution of monkeys
