https://www.youtube.com/watch?v=_vP4CUEdHfY
From 1:30, the video shows how hooman embryos are transported to another planet.
Dave, the android, sneaks in a few Alien embryos.
Hoomans can even go as far as only eggs and sperms are shipped frozen than fertilized when it arrives to the other planets.
Nothing new, this technology available today, practiced every day.
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