A PHOTO: Where Does the Sand Come From? Author AlexPublished on October 10, 2017 This image from NASA's Mars Reconnaisance Orbiter (MRO) shows one possible place where sand grains are being produced on Mars today. via NASA http://ift.tt/2yUEv9G Share this:MastodonEmailLike this:Like Loading... Related posts: A PHOTO: The Splitting of the Dunes A PHOTO: Linear Dunes, Namib Sand Sea A PHOTO: Full-Circle Vista With a Linear Shaped Martian Sand Dune A PHOTO: Antares Rocket Raising