New data is challenging what scientists previously knew about one of the youngest geological features on the Red Planet. That feature is Athabasca Valles, a system of valleys carved into volcanic ...

Mars, now a dusty world of rusted rock and thin air, once carried enough water to transform its face into something far more ...

The interior of Mars is as chunky as a delicious macadamia cookie. A new analysis of the acoustic waves that ripple through and bounce around the red planet's guts reveals that the ancient, early ...

NASA’s Curiosity rover captured a coral-shaped rock on Mars. Though not alive, its shape reveals clues about the planet’s geology. Small discoveries like this help scientists decode Mars’ ancient past ...

(CNN) — Here’s a look at the exploration of Mars. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine successful US Mars landings: ...

Frigid water helped paint Mars red and may have shaped a vast coastline, two new studies into the planet’s history reveal. Scientists have detected a possible ancient beach in Mars’ northern ...

A simulated view of Mars as it would be seen from the Mars Global Surveyor spacecraft (Unsplash via NASA) (CN) — Scientists have discovered the longest organic molecules ever found on Mars — carbon ...

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