New mapping of planet unveils the solar system’s largest known impact structure
Mars has two faces: a northern hemisphere where the ground is smooth and low, and a southern hemisphere of high elevation and many craters.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.