The ocean can be many colors, but for the most part it's deep blue. But why? And what's up with green or brown or red water?

Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising ...

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

Keep reading to learn more about Earth's different layers, its atmosphere, and what makes the "blue planet ... Pacific Ocean known as the Mariana Trench is the deepest spot on our planet ...

The biggest challenge of filming in the vastness of the Ocean is to find your subject. And the Blue Planet team wanted to film one of the most elusive of them all – the rarely witnessed ...

A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly half the planet. The blue areas show the depth of the ocean filled to the shoreline level of the ancient ...

If Blue Planet II has inspired you to help our oceans ... Every year, around 8 million metric tons of plastic waste enters the ocean, where it can prove fatal to marine life.

However, the ocean and its accompanying blue economy are actively being threatened ... As climate change raises ocean temperatures, action to protect the planet's oceans is becoming more necessary.