Mars Craters Tell Story of Water and Ice

Tongue-shaped features called lobate flows were seen on the wall of a 37-mile (60-km) diameter crater on the Martian surface. (Image taken with the Mars Oddysey THEMIS VIS camera.) (Image credit: NASA.)

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Berman and his colleagues have estimated the ages of some of these crater features using a technique known as crater counting, finding they range from 1 million to 10 million years old --relatively young, geologically speaking.

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Jeanna is the managing editor for LiveScience, a sister site to SPACE.com. Before becoming managing editor, Jeanna served as a reporter for LiveScience and SPACE.com for about three years. Previously she was an assistant editor at Science World magazine. Jeanna has an English degree from Salisbury University, a Master's degree in biogeochemistry and environmental sciences from the University of Maryland, and a science journalism degree from New York University. To find out what her latest project is, you can follow Jeanna on Google+.

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