Liquid water once shaped the Martian landscape dramatically, carving valleys, filling lakes, and forming vast oceans. Billions of years ago, during Mars' early days known as the Noachian and Hesperian ...

A new analysis of Mars’ gravitational field has revealed hidden structures buried beneath the remains of an ancient ocean. The work, which was presented this week at the Europlanetary Science Congress ...

In recent years, science has unveiled some astonishing secrets—from what lurks inside black holes to the discovery of a vast new “8th continent.” Even closer to home, researchers have uncovered a ...

There might be a hidden ocean's worth of liquid water below the surface of Mars, seismic evidence suggests. According to a new paper published April 25 in the journal National Science Review, ...

Scientists from Northwestern University in the U.S. led a series of underwater expeditions collecting water samples from the deep web of caves and sinkholes in the Yucatán Peninsula. The southeastern ...

Researchers made a tantalizing discovery after they MacGyver-ed old data from a radar instrument on a satellite gathered 14 years ago from the Moon. When they used the mission data in a fresh new way, ...

MERTIS data overlaid on a Messenger topographical map of Mercury. Image: MERTIS/DLR/University of Münster & NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington ...

A quiet threat has emerged in the far reaches of Canada’s Yukon Territory. The Tintina fault, once thought to be dormant for millions of years, has been showing signs of seismic activity, raising ...