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Time Line: Life on Earth
Gracie Williams
AP Biology
400
Million
Years
Ago
2
Billion
Years
Ago
3
Billion
Years
Ago
4
Billion
Years
Ago
5
Million
Years
Ago
5
Billion
Years
Ago
1
Million
Years
Ago
300
Million
Years
Ago
100
Million
Years
Ago
600
Million
Years
Ago
1
Billion
Years
Ago
200
Million
Years
Ago
500
Million
Years
Ago
700,
800,
900
Million
Years
Ago
Earth is said to be as much as 4.6 Billion years old.
The 1st Prokaryotes
Around 3.8 billion years ago, the first prokaryotes are said to have evolved on Earth.
ArchaeBacteria
Between 3.8 and 3.5 billion years ago, not much longer after the first prokaryotes evolved, archaebacteria is said to have evolved on Earth.
Approximately 3.5 billion years ago, eubacteria evolved on Earth around the same time as archaebacteria.
2.7 billion years ago, the first eukaryotes were said to evolved on Earth.
Around 2.3 billion years ago oxygen enters the Earth's atmosphere.
Approximatley 1.2 billion years ago, the Protisa kingdom is said to have evolved on Earth.
600 million years ago, multicellular organisms, and both the Fungi/Anamalia kingdoms evolved on the Earth.
Around 500 million years ago, the first vertebrates are said to have appeared in water on Earth.
Approximately 400 million years ago, the plant kingdom evolved on Earth.
130 million years ago, flowering plants evolved on Earth.
Finally, it is estimated that around 4 million years ago, humans were living on the Earth.