Cube-shaped snow, icy landscapes, and frost are all part of the Red Planet’s coldest season.

A new study using data from NASA’s Mars Odyssey orbiter may explain why Martian frost can be invisible to the naked eye and why dust avalanches appear on some slopes.

Among the missions are InSight, Mars Reconnaissance Orbiter, Mars Odyssey, and Curiosity, all of which have been critical to expanding our understanding of the Red Planet.