Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

In the tropics, the border between troposphere and stratosphere—the tropopause—sits at around 20km, far above any normal ...

As human activity grows in the Arctic, underwater noise is spreading through icy waters, disrupting how many animals ...

“The presence of liquid water [on Mars] is a broad topic that includes rains, rivers, lakes, as well as oceans,” says Ezat ...

Cutting down swathes of boreal forest and sinking the trees into the depths of the Arctic Ocean could remove up to 1 billion tonnes of carbon dioxide from the atmosphere each year. Coniferous trees ...

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago ...

A newly discovered ecosystem beneath the Arctic Ocean has changed scientists' understanding of deep-sea biodiversity and the way carbon cycles through the Earth's environment. Scientists, led by ...

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Location, location, location: Greenland’s position above the Arctic Circle makes the world’s largest island a key part of security strategy. But for whom? Increasing international tensions, global ...

Scientists have found a thriving deep-sea ecosystem nearly 2.5 miles beneath the Arctic Ocean. Led by researchers Giuliana Panieri and Jonathan T. Copley, the team uncovered an extraordinary set of ...