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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

Earth is said to be as much as 4.6 Billion years old.

4.6 Billion

Years ago

The 1st Prokaryotes

Around 3.8 billion years ago, the first prokaryotes are said to have evolved on Earth.

3.8 Billion

Years Ago

ArchaeBacteria

3.8-3.5 Billion Years Ago

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.

Eubacteria

Approximately 3.5 billion years ago, eubacteria evolved on Earth around the same time as archaebacteria.

3.5 Billion

Years Ago

1st Eukaryotes

2.7 billion years ago, the first eukaryotes were said to evolved on Earth.

2.7 Billion

Years Ago

Oxygen enters Earth's atmosphere

Around 2.3 billion years ago oxygen enters the Earth's atmosphere.

2.3 Billion Years Ago

Protista

Approximatley 1.2 billion years ago, the Protisa kingdom is said to have evolved on Earth.

1.2 Billion

Years Ago

Multicellular Organisms, Fungi, and Anamalia

600 million years ago, multicellular organisms, and both the Fungi/Anamalia kingdoms evolved on the Earth.

600 Million

Years Ago

1st Vertebrates Appear

in Water

Around 500 million years ago, the first vertebrates are said to have appeared in water on Earth.

500 Million

Years Ago

Plant

Approximately 400 million years ago, the plant kingdom evolved on Earth.

400 Million

Years Ago

Flowering Plants

130 million years ago, flowering plants evolved on Earth.

130 Million

Years Ago

Humans

Finally, it is estimated that around 4 million years ago, humans were living on the Earth.

4 Million

Years Ago

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