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

Mars’ positioning is what gives the lighter planet such a strong pull. “The closer it is to the sun, the more a planet ...

“The closer it is to the sun, the more a planet becomes dominated by the sun’s gravity,” Kane said. “Because Mars is farther ...

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 ...

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

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

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

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 ...

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too ...

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