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

Purposefully sinking boreal trees could help lock away carbon for millennia or longer, but the audacious plan comes with ...

In 2006, scientists released the first version of the Arctic Report Card, now a staple at the Fall Meeting of the American ...

Remains of an ancient Arctic rhino indicate that land mammals traversed the North Atlantic via land bridges, and did so much ...

A conveyor belt of ocean water that loops the planet and regulates global temperatures could be heading for a tipping point.

The Arctic Ocean, once locked in a vault of thick, old ice, now is transforming at lightspeed. Temperatures there are increasing at up to four times the rate of the planet overall, melting sea ice ...

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

Long thought of as a dry, barren world, Mars may once have shimmered with shades of blue. A new study reveals the discovery of ancient river deltas on the Red Planet, offering the clearest evidence ...

The Trump administration is eying the possibility of oil leasing in Arctic Ocean areas more than 200 miles from shore, an area where U.S. territorial rights are unclear. Information about the Trump ...

The Trump administration is eying the possibility of oil leasing in Arctic Ocean areas more than 200 miles from shore, an area where U.S. territorial rights are unclear. Information about the Trump ...