Last time we learned about Mars' great Valles Marineris, the largest canyon in the solar system. But what about here on Earth, is the Grand Canyon really the biggest? What I thought to be a simple ...

Scientists are now using some of the newest technology on Earth to unravel the most ancient secrets about the planet Mars. Member station KUNC's Rae Solomon has the story about how artificial ...

Valles Marineris West of Hydraotes, we find one Mars's greatest attractions, Valles Marineris. It's the largest canyon in the solar system, running the length of New York to Los Angeles ...

From arachnid-like formations and mysterious blobs to an underground ocean and a giant volcano, here are our 10 favorite things scientists discovered on Mars this year.

A rare astronomical event will take place as Mars disappears behind the full moon in a lunar occultation. This event, visible from the United States on January 13, marks the only lunar occultation of ...

One of the largest geographical changes on Mars ever observed is located in a crater on the floor of Melas Chasma. The giant dark streak is 59 feet wide — almost 4x larger than the average RSL.