News Planetary Science Martian sand ripples are taller than Earth’s Share this:FacebookTwitterPocketRedditPrintEmail By Sid Perkins November 30, 2003 at 7:25 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe