New research suggests that temperatures on ancient Mars may have fluctuated between hot and cold periods through a relatively ...

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

New research reveals ancient ripples on Mars, providing compelling evidence of long-lost lakes that once existed 3.7 billion ...

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

Harvard scientists explain how Mars had warm spells billions of years ago, allowing rivers and lakes to exist.

The car-sized Curiosity rover has spotted evidence of once quite hospitable environs on Mars.

During the fluctuations between warm and cold climates, the chemistry of Mars' atmosphere was also fluctuating. CO2 is constantly hit by sunlight and converted to CO. In warm periods, the CO could ...

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

Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

During the fluctuations between warm and cold climates, the chemistry of Mars’ atmosphere was also fluctuating. CO2 is constantly hit by sunlight and converted to CO. In warm periods ...

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

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