Mars may have once possessed an ocean at least as large as Earth's Arctic Ocean, a new study suggests. Previous research ...

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean ...

Mars is famous for its volcanoes, canyons and ancient river valleys, but some of its most active geology happens in slow ...

NASA's plans for Mars sample return are effectively cancelled as part of a bill approved by the U.S. Congress, ending efforts ...

Researchers uncover how Mars affects Earth’s orbit, offering new insight into the planetary forces behind ice ages.

Mars is absolutely dripping with evidence that the red planet was once a striking blue, complete with glistening lakes, ...

New simulations show red planet affects Milankovitch cycles that shape how solar energy is distributed on Earth over millions ...

Mars has an active, electrically charged surface where dust storms and spinning dust devils regularly move and reshape the ...

A rare triple conjunction of Venus, Mars and Mercury is happening on the opposite side of the solar system to where Earth is, ...

This doesn’t mean Mars causes ice ages on its own. Orbital cycles are only part of the picture. Earth’s oceans, atmosphere, ...

MAVEN has remained silent since Dec. 6 despite repeated attempts to contact it, according to NASA. As part of the recovery ...

A Mars spacecraft has now been AWOL for more than a month. But NASA hasn't given up hope of restoring contact with the MAVEN ...