depending on the chemical makeup of the water. The abundance of iron and the flourishing of microbial life provide evidence for a green ocean. Blue-green algae, also called cyanobacteria ...

and future changes could shift ocean colors again. Earth is known as the “blue planet,” but a new study published in Nature suggests that our oceans may have once looked green instead of blue.

It was Professor CV Raman, who revealed why the ocean looks blue ... out much of the red and blue light, leaving green as the dominant color that penetrated the water. To survive in this green ...

Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space ... to turn the surface water green. Once all iron in the ocean was oxidized, free ...