For all that is Scientifically related to Cosmology and Space. (NB: Please take discussions about UFOs, possible Alien contact, Crop-Circles, Alien Abductions, Planet-X and Niburu to the ‘Paranormal and Supernatural
’ Message Board).
Yes, they can grow in sand, or at least in dry conditions. I had two pretty yellow mushrooms sprout out of the dry soil in my potted cactus! They're lepiota lutea, which have a habit of growing in potted plants. Not all mushrooms need lots of moisture to live. It would be interesting to see if they could survive in Mars-like conditions.