In an article entitled Astronauts Are Going to Fill Outer Space With All Kinds of Weird Fungus, Gizmodo predicts, "Humans will make outer space dirty." In a nutshell, the theory is that humans inevitably carry large numbers of microorganisms in their bodies, and that those microorganisms will colonize the space habitats where people live. According to NASA's Planetary Protection Group, people carry more microbes than human cells. As fungi and other life forms enter new planetary environments along with their human hosts, some of those life forms might be able to adapt to the alien conditions and spread through those environments.
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Steven Tinel is an old school science fiction fan & blogger.
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