Main Events Of Our World Flashcards by Mo Feder | Brainscape

Q

4 billion years ago?

A

First life

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Q

3.5 billion years ago?

A

First bacteria (photosynthesis)

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Q

2.3 billion years ago?

A

Oxygen rich atmosphere

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Q

1.5 billion years ago?

A

First multicellular life

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Q

500 million years ago?

A

First plants on land

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Q

165 million years ago

A

Dinosaurs extinct & mammals evolve

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