Which event occurred during the Cenozoic era?
Cyanobacteria filled the water and air with oxygen.
Pangaea, the super continent, was formed.
Pangaea began to break apart into many continents separated by shallow seas.
Early humans began to make tools, harvest plants, and make cave paintings.
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Which event occurred during the Cenozoic era?
Cyanobacteria filled the water and air with oxygen.
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