Earth Timeline Flashcards by Tomas Gianoli

Q

When did Earth form?

A

4.56 billion years ago

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Q

When did prokaryotes form?

A

3.5 billion years ago

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Q

When did photosynthesising cyanobacteria form?

A

3 billion years ago

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Q

When did multicellular organisms form?

A

2.1 billion years ago

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Q

When did eukaryotes form?

A

600 billion years ago

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Q

When did land plants form?

A

420 million years ago

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Q

When did Homo sapiens form?

A

200 000 years ago

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