In 2024, scientists made headlines when they found evidence of copious amounts of water inside a layer of the Martian crust.

Researchers have found new evidence for a massive subsurface ocean on Mars, again raising the possibility of microbial life.

Seismic readings of the interior of Mars strongly suggest large quantities of water buried 6 to 12 miles underground.

Because of the absence of liquid water on Mars’ surface today, those rusty red minerals were thought to arise from dry iron oxides present in the dust, such as hematite. But new analysis of ...

Together, these factors emphasize the importance of studying Mars’ ancient hydrothermal activity to better understand its surface hydrology and deeper geologic history. Martian meteorites offer ...

Mars may once have held enough water to fill oceans and form coastlines. The planet’s red dust contains water and likely formed in cold conditions.

InSight landed on Mars in November 2018 and was charged with digging into the Martian topsoil, listening to winds and dust devils on the planet’s surface, and—perhaps most productively ...

Ferrihydrite typically forms quickly in the presence of cool water, and so must have formed when Mars still had water on its surface. The ferrihydrite has kept its watery signature to the present ...

The red planet Mars, named for the Roman god of war, has long been an omen in the night sky. And in its own way, the planet’s rusty red surface tells a story of destruction. Billions of years ...

But a team of ESA and NASA scientists now think that Mars rusted earlier in its ancient past than previously known, when liquid water was widespread on the planet’s surface. Iron oxide—which ...