NASA researchers have identified geological structures on Mars that are unlike anything found on Earth. From spider-like ...

Formations that look like jumbo-sized kidney beans (or blobs of chocolate syrup, depending on your palette) may be indicators ...

Though it's a cold, dead planet, Mars still has its own natural beauty about it. This image shows us something we'll never ...

Billions of years ago, Mars had a thick atmosphere and water, but in both cases, just a tiny amount remains today. Both ended ...

The above image shows a 20-meter-long chunk of frozen carbon dioxide falling off a cliff. Rising temperatures during the ...

Ultimately Mars' once thick atmosphere diminished, and bounties of water escaped. Without this insulating blanket, the planet dried out. Yet for millions of years, Mars at least had the ...

There’s another complicating factor: Mars has a far thinner atmosphere than Earth ... and an outer crust that’s an average of 40 miles thick. Its core is likely made of iron and nickel ...

The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for ...

Some of Mars’ CO2 geysers erupt and create dark spots as large as 1 km across. They are fueled by considerable power and can ...

By imaging the dunes, scientists can figure out how much CO2 frost forms on the dunes during the Martian winter. When temperatures grow warmer in the spring, the frost sublimates, transitioning from a ...