Learn more about volcanic activity on Mars and how it may have once provided vital elements to the atmosphere.

Mars is about 140 million miles from our cozy planet. A human mission to that cold, rocky neighbor would mean being away from Earth for about 3 years. But the things those explorers would see and ...

Olympus Mons, a shield volcano on Mars, is the largest volcano in the solar system, measuring approximately 370 miles in diameter and 26 kilometers in height. The formation of Olympus Mons and three ...

The images, captured by the Mars Express orbiter, reveal the volcano's southeast flank with hundreds of overlapping lava flows.

Stephen Smith is a managing editor for CBSNews.com based in New York. A Washington, D.C. native, Steve was previously an editorial producer for the Washington Post, and has also worked in Los Angeles, ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Arsia Mons, one of Mars' largest volcanoes, pokes out of the clouds just after dawn. | Credit: ...

Analysis of the second confirmed interstellar comet to visit our solar system suggests that the alien body could be covered ...