Like the sky, water scatters light so that more blue reaches our eyes than other colors. We know that pollutants or an abundance of lifeforms can change the color locally, but it would take a lot ...

For ages, Earth has been known as a blue planet, a vision largely shaped by the vast oceans that cover three-quarters of its surface. But what if this wasn't always the case, and our oceans used ...

It’s hard to picture now, but Earth’s deep blue oceans were once green. According to a new study by Japanese researchers, early photosynthesis helped shift the colour of our seas.

The Ocean Cleanup is dedicated to removing plastic from the world's oceans. It's a formidable task: National Geographic estimates that 5.25 trillion pieces of plastic, the equivalent of 269,000 ...

Earth's oceans were once green, according to a new study. Carl Sagan, the host of the popular TV show Cosmos, once described Earth as a 'pale blue dot' when explaining an image taken by Voyager 1 ...

A new study suggests Earth's oceans may have been green during the Archean eon, around 3.8 to 1.8 billion years ago. The greenish hue was due to high iron content and early microbes performing ...

Credit: X/Indian Navy India’s maritime aspirations have long revolved around the dream of a blue water navy – one capable of projecting power far from its shores. But as geopolitical realities ...

New research suggests that early oceans were green, not blue, giving our planet a green hue overall. Here’s what made early Earth’s oceans green, and how it could happen again. The Weather Channel ...

Earth’s oceans may not have always been as brilliantly blue as they are today. In fact, there may have been a time when they weren’t blue at all. According to researchers at Japan’s Nagoya ...

Imagine the world’s oceans with their beautiful blue color. Now, imagine that the same oceans were green. This is the intriguing possibility suggested by new research from Nagoya University in ...

The ocean that nurtured life in the ancient past was 'green'! ~Understanding the evolution of photosynthetic organisms on Earth 2.5 billion years ago~ - Nagoya University Research Results Information ...

Underwater green-light environment after the emergence of cyanobacteria and photoferrotrophs in the Archaean era. Credit: Nature Ecology & Evolution (2025). DOI: 10.1038/s41559-025-02637-3 A team ...