Earth's History
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History
Atmosphere
>
First Record of the Magnetosphere
Ozone Layer Appears
Hydrosphere
>
First Water in the Atmosphere
First Oceans
Geosphere
>
Formation of the Moon
Pangaea Forms
Biosphere
>
First Land Animals
First Modern Humans
Mass Extinctions
>
End Permian Extinction
Cretaceous Extinction (KT)
Chronological
Citations
First Land Animals
2 billion years ago
The creation of the
ozone layer
allows the fish to leave the ocean and live on the land because there was less radiation out of the water.
Home
History
Atmosphere
>
First Record of the Magnetosphere
Ozone Layer Appears
Hydrosphere
>
First Water in the Atmosphere
First Oceans
Geosphere
>
Formation of the Moon
Pangaea Forms
Biosphere
>
First Land Animals
First Modern Humans
Mass Extinctions
>
End Permian Extinction
Cretaceous Extinction (KT)
Chronological
Citations