Mars

Native Martian Life: Mars was struck by numerous rock particles ejected from Earth in the heavy bombardment period of the solar system. Only simple bacterial life made it in a frozen state to Mars around 3.5 billion years in the past, and spread quickly in martian surface water, and evolved quickly to more sophisticated strains, some triggering massive geological upheaval in the following 1 billion years. Early life was photosynthetic, but lost the ability to survive in surface conditions and evolved to a survive in geologically active regions. Remaining martial life is remarkably uniform and simple, with only a few dozen distinct bacterial and fungus analogue strains identified. Much of this life has gone extinct from human colonization and industrialization efforts underway, although 2 strains have been thriving and are considered somewhat dangerous as they have been known to infect a wide range of terrestrial soil cultures and contaminate plant species with a not completely range of prions.