But the reality is that it's been at least 10 million years since the formidable Arsia Mons erupted.It must have been a pretty remarkable eruption, too, as the volcano is an incredible 270 miles ...

Microbial life could potentially have thrived for a time at the foot of Arsia Mons, a giant volcano about twice as tall as Mt. Everest, while the dinosaurs were just coming into their own on Earth ...

NASA Odyssey orbiter snapped a first-ever image of a Mars volcano peeking above clouds before dawn. It’s twice as tall as Earth’s largest volcano.

Arsia Mons is the southernmost volcano in a group of three massive Martian volcanoes known collectively as Tharsis Montes. Until now, the volcano’s history has remained a mystery.

Braided fluvial channels (inset) emerge from the edge of glacial deposits roughly 210 million years old on the martian volcano Arsia Mons, nearly twice as high as Mount Everest.

The volcano Odyssey spotted is known as Arsia Mons, one of three that forms the Tharsis Montes, or Tharsis Mountains.Though clouds composed of carbon dioxide are common on Mars, the Martian ...

Arsia Mons itself measures 435km (270 miles) in diameter and rises more than 9km (5.5 miles) above the surrounding plains. For context, the highest dormant volcano on Earth, Ojos del Salado on ...

Because of its cloud cover, Arsia Mons has been hard to photograph. This new image from NASA's 2001 Mars Odyssey orbiter gives a first-of-its kind view at the peak of the volcano.

The volcano Arsia Mons, while still active, was covered by an enormous glacier around 210 million years ago. The volcano Arsia Mons, while still active, ...

Volcanic activity in Arsia Mons — the southernmost member of the Tharsis Montes group — most likely peaked roughly 150 million years ago.