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Earth, Green and Ocean

Oceans on Earth may have all been green for eons before they turned blue

Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with oxygen.

New Scientist · 2d

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

Some cyanobacteria have pigments that specialise in harvesting green light to power photosynthesis, which may be because they evolved at a time when the oceans were iron-rich and green-tinged

Popular Mechanics · 1d

Earth’s Oceans Were Green a Billion Years Ago. They Could Soon Be Green Again.

Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising temperatures are once again causing the world’s oceans to turn green.

"Purple Earth" hypothesis is gaining momentum in the scientific community

Purple Earth Hypothesis suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for ...

10monon MSN

A New Study Suggests Aliens Aren’t Little Green Men. They’re Purple People Eaters.

The search for life beyond Earth requires expanding the very definition of what life can be. Some exoplanets, especially ...

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