"Rootless cones form when lava flows over wet or icy ground, causing it to boil and explode," said Dundas. "The region around ...

To learn more about these rocks, the study authors mapped a region of 19,300 square miles (50,000 square kilometers) using data from the Context Camera on the Mars Reconnaissance Orbiter, a NASA ...

they were able to create a clearer picture of what happens after a super-eruption. Related Stories Astronomers discover giant ...

Rootless cones are small volcanic landforms ranging from several to several hundred meters in diameter, formed by continuous ...

the pit is part of a series found on the flanks of volcanoes in the Tharsis region of Mars. It appears to be a vertical shaft, prompting speculation about its origin and composition. Pits and ...

This story appears in the November 2016 issue of National Geographic magazine. In winter the temperature at the poles of Mars can reach 200° below zero Fahrenheit. But make no mistake: The red ...

Credit: NASA/JPL-Caltech/Univ. of Arizona Debris from ancient volcanic eruptions on Mars could offer new clues in the search for alien life, a new study suggests. The newly discovered rock type ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Debris from ancient volcanic eruptions on Mars could offer new clues in the search for alien life ...