Podrock: Pareidolia, or Possibly Petrified Protozoans?
http://www.hou.usra.edu/meetings/lpsc2015/pdf/1613.pdf
http://www.hou.usra.edu/meetings/lpsc2015/pdf/1613.pdf
Is there ANY reason to suspect that the cauliflower rocks on Mars are due to microbial activity?
I have seen this paper hyped in various popular science sites but from reading it, its not clear that there is proof that the analogous structures found on Earth are formed by microbial activity...