Historically, there have been four oceans: the Atlantic, Pacific, Indian, and Arctic. On Feb. 9, U.S. Secretary of the Interior Doug Burgum announced the Gulf of Mexico had officially been changed to ...

But while lifeless during that time, the planet was already covered by vast oceans dotted with hydrothermal vent systems that ...

Green oceans on early Earth, shaped by iron, pushed microbes to evolve light-absorbing tools that worked in green light.

Nearly three-fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese ...

There are certain things that have become mainstays on Earth. One of these things is the ocean being blue, there are ...

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth's history. By comparison, the entire history of the rise and evolution of ...

In the waters off Iwo Jima, a volcanic island in Japan’s Satsuma archipelago, the sea has a distinct green tint. It’s not just a trick of the light — it’s caused by microscopic particles of oxidized ...

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth’s history. By comparison, the entire history of the rise and evolution ...