Thor Versus Loki? Raganrok this Saturday!

No, this isn't another Marvel superhero movie, at least not yet. What this is is another end-of-days prophecy, this time courtesy of the Vikings. We've heard it before: Y2K, The Rapture, The Mayan Apocalypse. But this is the Norse name: Ragnarok. Set to occur this Saturday, the events will kick off when Loki's grandson, Skoll,…