If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. Sand dunes are not uncommon on the surface of Mars. However, during observations to see ...

In fact, it's carbon dioxide ice, and at Mars' south pole, there's 26-foot-thick (8-meter-thick) layer of it year-round ... winter frost lining the sides of dunes on Mars. This frost can prevent ...

And NASA scientists are incredibly excited because it's the first time anyone has had the chance to study active sand dunes beyond Earth. One of the first things they want to explore is the "grain ...