For more than 400 years, sailors have reported a mysterious phenomenon in which the ocean appears to glow bright green […] ...

A new study suggests that the Earth’s oceans may have changed color over time and could change again in the future, depending ...

The disappearance of sea ice in polar regions due to global warming not only increases the amount of light entering the ocean ...

Melting polar ice narrows the light spectrum underwater, favoring blue-tuned algae and disrupting the ocean food web.

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.