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

NASA’s Mars InSight mission was designed to study the interior of Mars rather than its surface. During its operation, the lander achieved several historic firsts, from detecting marsquakes to ...

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

We know what happens during an earthquake on Earth... but what about an earthquake on... Mars? Join Hank Green for a fun new ...

A pull in the right direction ...

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

These are missions only NASA can lead. Everything else should go to partners who can deliver faster and cheaper.

Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...

MAVEN was built to last in orbit until 2030 — that's not looking likely anymore.

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

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