Wow, some convincing photographs in that pdf. As of this moment I'm operating under the impression Mars is teeming with shrooms. The orbital photographs did't

Wow, some convincing photographs in that pdf. As of this moment I'm operating under the impression Mars is teeming with shrooms. The orbital photographs did't make much impact, since at that scale you can convince yourself all sorts of atmospheric and geological activity resembles life. But the rover photographs comparing to puffballs and clearly showing stems in some cases, very convincing. Edit: elsewhere in the comments it was pointed out that stems could easily be explained by blown away dust/sand after formation, without involving biological processes. Which is a very good point. It's still fun to imagine a Mars covered in mushrooms however.