: You could also theorize that the Mythworld lies on an
: alternate plain. In that world, the 'Earth' as it
: were, shifts differently and Magic is something that
: came about maybe from differences in the timeline.
: Where we developed technology, that world develops
: magic. A deity creates Trow instead of Adam and Eve,
: and so on and so forth.
Or an alternate Marathon universe. Sleeping god crashes at the Great Devoid site instead of the Yucatan (as in Forrest's theory); this sends evolution onto somewhat different tracks and so assorted species like Dwarves and Myrkridia arose which were never seen in the Maraverse.
And the Trow? Maybe they existed in the Maraverse too--but had the bad luck to live in the Yucatan. :-)
--SiliconDream