Bacteria are not space aliens
They're at it again, 'boffins' pretending that bacteria is the same as 'space aliens'. They're not, no-one cares if an asteroid, or mars, or one of Jupiters moons has some bacteria on it, even less so if it's long dead bacteria. No-one ever wrote a Sci-fi film where the humans leave earth in a huge ship, spending decades in 'stasis' to reach another solar system and find some microbes.
'Boffins' stop pretending that your life's work and all the funding are worthwhile because you found 3 billion year old fossils that are evidence of some prehistoric bacterial life. Unless it has a weapon or at least is more intelligent than my dog I don't want to know.