The Dunes in Mars’ Wirtz Crater In Mars’ Wirtz Crater, these dunes are likely active. from NASA Image of the Day https://ift.tt/2TXbOED Share this:TwitterFacebookWhatsAppTelegramRedditPinterestTumblrEmailLinkedInSkypePocketLike this:Like Loading... Related Published by Renee Tarot Chief news curator and Editor. View all posts by Renee Tarot