Este fue
tu cielo.

Melting Snow and the Gullies of Mars

Images from the Mars Odyssey spacecraft show gullies on Mars, which hint at recent flows of liquid water. However, Mars is too cold and has too thin an atmosphere for liquid water to last on the surface. This particular image shows a section of what is likely a snow-covered crater in the Martian southern hemisphere. Scientists are working on new explanations for how liquid water could have carved these features.