Sandy Gas Jets Hypothesized on Mars
Observations made with THEMIS (The Thermal Emission Imaging System) instrument from NASA's Mars Odyssey found cold spots on Mars. The cold spots were revealed to be carbon dioxide (CO2). In spring when the poles warm, CO2 on the surface thins and underlying CO2 escapes from the planet's surface. These erruptions mix with dark sand and are very cold because of the CO2. This picture is a hypothesis of what these seasonal dark spots on Mars' surface would look like.
