Earth’s oceans may have been green for billions of years

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Earth’s oceans may have been green for billions of years

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The sea around Satsunan-Iwo Island in Japan, is green because of high levels of iron

Taro Matsuo et al. (2025)

For a long stretch of Earth’s history, our planet might have looked green from a distance, instead of the pale blue dot we know today.

Earth’s green *******, which lasted from around 3 billion years to 600 million years ago, probably drove the evolution of the cyanobacteria that filled the atmosphere with breathable quantities of oxygen, says

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at Nagoya University in Japan.

Like plants, cyanobacteria capture…

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#Earths #oceans #green #billions #years

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