Humans come from Kobol. Twelve tribes left Kobol and made the Colonies, and the thirteenth went to Earth.
[He sounds less suspicious now -- more distant, thinking, calculating. The odds of two human populations, and two planets called Earth...] We always thought they were humans, too, the thirteenth tribe. We didn't know until we got to Earth, and then the skinjobs -- the ones that look like people -- they figured it out. Or... remembered, somehow...
[...And two infestations. He blinks, refocusing.] ...Parasites?
[Spam]
[He sounds less suspicious now -- more distant, thinking, calculating. The odds of two human populations, and two planets called Earth...] We always thought they were humans, too, the thirteenth tribe. We didn't know until we got to Earth, and then the skinjobs -- the ones that look like people -- they figured it out. Or... remembered, somehow...
[...And two infestations. He blinks, refocusing.] ...Parasites?