Caltech scientists published a study using NASA Curiosity rover imagery showing the past existence of warm water on Mars.

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 ...

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

Venus, Mars, Jupiter, Saturn, Uranus, and Neptune—will be visible to stargazers on 25 January. This planetary parade offers a ...

Thousands of mysterious clay mounds found on Mars were formed by ancient water on the Red Planet's barren northern plains, ...

Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic mission may investigate the area one day.

Though such alignments aren't unheard of, this particular formation was special due to the sheer number of planets visible ...

Astronomical lineups are quite common. However, what sets this month’s planetary parade apart is the number of bright planets ...