text: do you believe that it is possible that aliens (extra terrestrials) genetically engineered humans in a lab?   i think that an advanced biotechnology might be able to copy the human model, but it would be a lot more complicated to genetically engineer and produce not only the humans but all the rest of the living organisms on earth.  think of it: if you wanted to colonize a planet, would you engineer a species like ours, or would you make adaptations to your own species?  terry pratchett's novel "strata" tells of world builders who create entire planets complete with faked pre-history. and spoofs the idea...