Bright white rocks found by NASA’s Perseverance rover hint at ancient Martian rain lasting millions of years, raising new questions about how wet Mars once was and what those conditions might mean.

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

Ancient shoreline features hint that water on Mars once formed a vast ocean.

Decades of exploration have transformed our understanding of Mars, from Viking landers to the rovers Perseverance and ...

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

On January 25, 2004, NASA's Opportunity rover landed on Mars! This was the second of NASA's twin Mars Exploration Rovers to ...

Since humans first started observing Mars, the existence of nocturnal ice clouds on the Red Planet has been known, primarily through daytime observations and sophisticated climate models. Twilight ...

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too cold.

New simulations show red planet affects Milankovitch cycles that shape how solar energy is distributed on Earth over millions ...

SpaceX CEO Elon Musk has yet again explained why Mars is a crucial mission for humans. His SpaceX ambitions include multiple ...

Advances in technology have reopened the debate over terraforming Mars, shifting it from an impossible dream to a long-term scientific and ethical question.