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.

In his prepared remarks, Trump, a longtime backer of U.S.-led space exploration and exploitation, singled out Mars and left the moon hanging.

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

Research suggests that an ancient shoreline helped to sculpt the drop between Mars' southern and northern hemispheres.

The Red Planet reaches its best position all year this week on January 15. Here’s how and when to get out and see it.

It’s a term used by astronomers to describe when Earth, Mars and the Sun align. When this happens, Earth sits directly between Mars and the Sun, positioning the red planet directly opposite of the Sun in the sky.