See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Earth's oceans, known for their deep blue hue, could one day undergo ...

Nearly three-fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth's oceans were once green, in ...

Mother Ocean Day is Saturday, May 9, so here’s a few facts about our waters.

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Where do Earth's oceans come from? The debate on whether water may have been originally delivered to our planet by comets striking its surface has reopened after a new groundbreaking study. Published ...

The deep blue sea may not have always been so blue. A new study suggests that the Earth's oceans may have changed color over time and could change again in the future, depending on the chemical makeup ...

All of Earth's deepest ocean trenches are located in the Pacific Ocean, a result of intense tectonic plate subduction. These ...

The world’s oceans set another alarming record in 2025, and scientists say the impacts are already being felt in the form of stronger storms, heavier rainfall and more extreme weather worldwide. A new ...

Oceans around the globe have become darker over the last two decades, leaving researchers fearful for their marine inhabitants, according to a new study. Professor Thomas Davies of the University of ...

Research shows Mars' gravitational pull affects Earth's deep-sea currents and climate, causing warming cycles every 2.4 ...

A Martian geological structure could provide evidence of an ocean that once covered a third of the red planet. This ...

We've always called Earth the blue planet, but that color might not be permanent. Previous research claims our oceans were once green, and if environmental conditions shift dramatically, a new study ...