Board Thread:Warhammer 40k General Discussion/@comment-18016240-20140707161751/@comment-25177957-20150315095204

Speaking of the Dark Angels, Cypher is quite old, he was around during the fall of Caliban and during the Horus Heresy. While it is true that Cypher has probably spent some time in the warp, it seems like is uncorrupted physically and has spent lots more time in realspace as well, technically this could make him the oldest Space Marine who has had a certain (x) amount of time in realspace?

Luther as well, but he's not actually even Astartes, he was to old to recieve the Astartes organs at the time, so essentially he's the oldest human, and non-Astartes still alive, assuming no Thunder Warriors are.