Board Thread:Speculation House/@comment-25266931-20151213225959/@comment-24891101-20151214193832

Because the evolutionary history of the planet is completely different? If you rolled Earth back and let time run, evolution would not produce dogs again. Zwei is only a dog because it has been presented to us as such.

You're misunderstanding. It's quite possible under the Short Timeline Hypothesis for human colonists to have introduced familiar lifeforms, if indeed an alternate Earth exists. However, we'd still see native fauna.