If aliens exist, they would obviously want what makes us unique. It's not minerals, slave labor, or anything like that. It would probably be the fundamentals about what makes us tick, our DNA, our bio-energy, hell...maybe even our souls? If a soul actually exists. Theoretically it would be wise to accumulate the best traits from a variety of species, then weave them into the ultimate being, or form of life. Kind of like a forced survival of the fittest, except through artificially engineered means.
Edited by Spid3rCyd3, 04 May 2012 - 03:01 PM.