Board Thread:Speculation House/@comment-25266931-20151213225959/@comment-24891101-20151214170737

You've stumbled across the Short Timeline Hypothesis, where humans have no evolutionary history on Remnant.

However, consider the translation convention, where linguistic, cultural, and even biological aspects are translated for our benefit, because the originals have no meaning to us. They don't speak English on Remnant, nor do that have the same cultural touchstones, nor perhaps the same animals, nor even perhaps are human themselves. But we related to them better when they're familiar, and thus a writer translates many things across, leaving only some for flavor. This is the implicit assumption underlying all of fiction.