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22 déc. 1933 - December 22, 1933 5:52:00 am Some oxygen converted to ozone to form a protective layer against UV radiation First life on surface of ocean/land possible because of protection from ultraviolet radiation

Ajouté au bande de temps:

Timeline of Earth Redone

ByEmily Rudo
1 oct. 2018
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Date:

22 déc. 1933
Maintenaint
~ Il y a 91 ans
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