[Harmless Teddy Bear]

If you import the microbes and water you can grow some very fine stuff.

Which is what they are trying to do.

[rjsimmon]

Yeah, the importation this is what is a logistical impossibility. Transporting water is not feasible in our lifetime. At least, not in sufficient quantities.

Maybe if we found a space-borne iceberg...

But then, NASA would probably name their ship Titanic...