Fabius Bile is a warhammer 40000 Chaos Space Marine. Prior to the defeat of the Horus Heresy, he was a Lieutenant-Commander and Chief Apothecary of the Emperor's Children. He is now an infamous mad scientist, specializing in genetic manipulation and the creation of Enhanced Warriors.
Fabius Bile did experiments on sentient beings. He has to create a new race that populate the worlds that emerged after the death of the old world.