How would life evolve, or could life be engineered to live, in the absence of an atmosphere?

They say that nature abhors a vacuum, but could life evolve to live in one? Alternately, could life be engineered to exist on a planet with no atmosphere, even if there is no biologically feasible path through which this life form could evolve?

By vacuum, I mean 'no atmosphere', but with ground. Something like the moon, rather than something like deep space. If life in a vacuum is possible, what I'm really interested in is this: what would the life forms be like? What adaptations would they need to cope with life in a vacuum?

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How would life evolve, or could life be engineered to live, in the absence of an atmosphere?

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