The Proterozoic eon was the gathering up of oxygen in Earth's atmosphere, and the Phanerozoic eon coincides with the major diversification of animals, plants, and fungi.
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Scientists untangle interactions between the Earth's early life forms and the environment over 500 million yearsThe atmosphere, the ocean and life on Earth ... including plants and animals, and the chemical environment in the current Phanerozoic Eon, which began approximately 540 million years ago.
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