"I'm quite serious when I say have a really good look at these new Mars images... something is actually moving and changing with the seasons that suggests, at least, vegetation." - Sir Arthur C. Clarke, interviewed by Leonard David from Space.com. To read the article, click here.

Located near the South polar region, these structures appear to be trees. Whatever they are, they are quite large. The one in the upper corner measures over half a mile wide. And in the image below you can see where the trees are found closer together so that they start to form a forest.