Board Thread:Warhammer 40k General Discussion/@comment-25222488-20151025234507/@comment-25507520-20151222185912

It is thought by some Imperial Schoalars that the Tyranids are running from something. This has almost entirely been debunct because the Tyranids have yet to come in full force, were sleeping for their entire time in the void, and have come from a different direction nearly everytime.

I suppose GW could us that to beat the Tyranids, but then they would be screwing the galaxy more and then they would have a lot of explaining to do. Its much, MUCH safer to say that they are indeed a nomadic race of xenos that has gone around the universe eating and stripping galaxy after galaxy of its biomass since sometime around the creation of the universe.