the idea is that the PXers spliced their DNA with the "monkeys" of this planet, creating what we are, Homosapiens. So that would mean that we (homosapiens) share common dna with the PXers. so in theory we would have a little resembalence to them in our thought patern. so all the ufo\'s we see, may just be them checking on their experiment, much like we would do if we were in their shoes.