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

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

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, ...

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 ...

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 ...

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

NASA is quietly ending financial support for independent planetary science advisory groups, according to a letter posted to ...

Engineers at the Jet Propulsion Laboratory (JPL) confirmed signal lock with Perseverance first, followed by Curiosity and the Mars Reconnaissance Orbiter relay network.