Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests. New evidence of ...

Even though the Red Planet's atmosphere is thin, wind is still one of Mars' most relentless sculptors.

Three billion years ago, you could have stood on Mars and watched a river spill into a sea. That picture is still speculative ...

Ancient shoreline features hint that water on Mars once formed a vast ocean.

Arcadia Planitia does not draw attention in the way Mars’s great canyons or volcanoes do. It sits quietly across the northern ...

A major change from the 25-day Artemis I mission in 2022 is the path the crew will take. Artemis II will use what NASA calls a "free return trajectory," which means once Orion heads toward the moon, ...

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

To land on the right foot on the Red Planet, European engineers have been dropping a skeleton of the four-legged ExoMars ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Portugal has entered the small group of countries with experimental capability in hypersonic research ...

Scientists have traced ancient Martian shorelines inside a giant canyon, revealing where a vast ocean once stood and why ...

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 ...