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1 CE
Earth is Formed
4600 million years ago
Gravity slowly gathered this gas and dust together into clumps that became asteroids and small early planets. -
2
1st multicellular life
3,500 million years ago, more complex forms of life took longer to evolve. -
3
Oxygen enters atmosphere
2,450 million years ago, oxygen was becoming a significant component of earths atmosphere. -
4
1st Eukaryotes
2,100 million years ago, some of the earliest known single called eukaryotes fossils are acritatchs. -
5
1st Homo sapiens
1,800 million years ago, the first Homo sapiens were on earth. -
6
1st forms of life
1,300 million years ago, earths initial life forms were bacteria, which could survive in the highly toxic atmosphere that existed during this time. -
7
Pangea Formed
270 million years ago, all the continents were together. -
Pangea begins to break up
200 million years ago, Pangea begins to break apart. -
5 Major Mass Extinctions
-Ordovician
-Late Devonian
-Permian Mass
-Triassic
-Cretaceous
