Board Thread:Warhammer 40k General Discussion/@comment-6078851-20130130174042/@comment-5781149-20130317174412

You are right mcdonald. The primarch project took years of scientific labor to fruition, and then once the primarchs were created,they were flung out into space and weren't found for years. Then the Emperor uses the genetic template of each primarch and turned it into their respective legion.