thanks stephen...but i dont like the idea that someone can create out of nothing an organism, to elaborate and develop out of nothing a multimillion cells complex creature is ultra sci-fi... i believe that the space jockey issue was created in the 90's to fill the gaps that left the original 1979 film in the reproductive system and all the faults of the aliens... so the concept that in the novels the Space Jockey's race are shown to be malevolent, and have used the Xenomorphs as a weapon to kill all life on Earth so they can take is i little immature, a simple RetroVirus HIV-style (aids) can do the job and the only precaution would be the creating of an effective vaccination, not necessary to create a creature that in the end you lose control of it...(a fact that undervaluates the potentials of the so called Gene-Master Ultra-Biologist Alien-Creator space jockey, could just add an obbey gene? )The concept that Alien eggs would be used as "bombs" on an enemy planet and then the Xenomorphs would proceed to kill the entire population as they spawned is out of the question, think the funds and time needed to create 1.000.000 eggs, load them in, lets say , 150 B-52s (1 for every nation aprox) and attack hoping that not even one plane would be shoot down before the load drop and after you must wipe-out every single alien with what? nukes?