An exoplanet is a planet outside our solar system that usually orbits a star in our galaxy. More than 7,000 have been found ...

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

Did Mars have lakes and rivers during a single period or over separate periods? This is what a recent study published in ...

Astronomers who identified HD 20794 d say its proximity to its host star and orbital pattern suggest it could hold water.

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

Located less than 20 light years away, HD 20794d could potentially be one of the most Earth-like planets found so far, ...

The 3.7-billion-year-old formations in the planet's Gale Crater suggest the presence of long-gone bodies of liquid water, ...

A planet that may support alien life has been discovered less than 20 light-years away from Earth - and it's believed to ...

Huge breakthrough in the search for aliens: NASA discovers a 'super Earth' exoplanet just 20 light-years away that could have the right conditions to support life For millennia, humans have asked ...

Discoveries of clay minerals in Martian mounds by researchers indicate that Mars once had large bodies of water billions of ...

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 researchers think they have a good explanation for a ...

As humankind imagines living off-planet — on the moon, Mars and beyond — the question of how to sustain life revolves around the physical necessities of oxygen, food and water. We know there is water ...