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6 BCE
1st multicellular life
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5 BCE
Pangaea begins to break up
Pangaea broke apart about 200 million years ago. -
4 BCE
Pangaea formed
About 300 million years ago, Earth didn't have seven continents, but instead one massive supercontinent called Pangaea, which was surrounded by a single ocean called Panthalassa. -
3 BCE
1st forms of life
Started about 3.8 billion years ago. A prokaryotic cell evolved into fish,and forests and soon life was on earth. -
2 BCE
Oxygen enters the atmosphere
Cyanobacteria enters the atmosphere causing oxygen to form. This happened 2.4 billion years ago. -
1 BCE
Earth is formed
The earth was thought to have been formed 4.6 billion years ago.
