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An image of one of the many valley networks in the southern highlands of Mars. A new study suggests that water only flowed intermittently, but that it was enough to create these networks. | NASA/JPL-Caltech/Arizona State University
Planets

Meltwater From Glaciers May Have Flowed on Ancient Mars

A study suggests that past temperatures on Mars could have sometimes peaked just above freezing, allowing meltwater to carve out distinctive features.

October 18, 2017
6:46 PM EDT
This image from the Curiosity rover shows a dry environment around Gale Crater. NASA/JPL-Caltech/MSSS