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first photosynthetic organismsBGR
•Science
Science
84% Informative
According to new research, Earth may have had green oceans for billions of years before they finally took on their familiar blue hue.
Scientists believe that sometime between 3 billion and 600 million years ago, Earth ’s oceans had a very different appearance.
During this period, cyanobacteria , the first photosynthetic organisms on Earth , began to evolve in these iron-rich waters.
Unlike modern plants, which mainly use chlorophyll to absorb blue and red light, early cyanob bacteria developed special pigments called phycobilins.
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