New research suggests ancient Mars may have been warm and wet, with rainfall or snowmelt carving its iconic valleys.

Groundbreaking study finds Mars may once have had rain and snow - Research provides new insights into evolution of Red Planet ...

For the past four years, NASA 's Perseverance rover has rambled over a region of Mars where scientists say a strong river ...

Though Mars, the Red Planet, is a vast and inhospitable land today, scientists think it once resembled our very own Earth — ...

Visit ancient Mars—a surprisingly temperate planet where snow or rain falls from the sky, and rivers rush down valleys to ...

Mars, the Red Planet, looks nothing like Earth today. However, its geological features indicate it once had a warm and wet ...

The surface of Mars is extremely cold, irradiated, and desiccated. But at one time, the planet was much warmer and wetter, ...

The Perseverance rover has found some intriguing samples on the red planet. Here's what they might reveal about the origins ...

A new analysis by UC Boulder geologists suggests the ancient Mars landscape was formed by falling precipitation, including ...

The HiRise camera is living up to its name, capturing a rare look at the veteran rover from way up in Martian orbit.

"Before Hubble, no generation ever had access to unimaginably vibrant views of space, stretching almost all the way back to ...