Well it was made out of plywood. Unless they made the wood poisonous to all life, it is also food. And humans basically exhale the rest of what fungi need to th

Well it was made out of plywood. Unless they made the wood poisonous to all life, it is also food. And humans basically exhale the rest of what fungi need to thrive. Space is not all that inhospitable to life. There are strong theories that after major cataclysms on earth, rocks in space with life attached then reseeded earth when they came back down.