[quote=@Silverwind Blade]
<Snipped quote by Starlance>
...although the OP post does mention for humanity that Earth is a long-lost myth, and nobody really knows where humans come from - they just seem to be everywhere. 
[/quote]
Am aware, I tried to word it in a way that would convey that they don't know either (long forgotten ancestry etc.) They basically knew they must be from the same place, since they're the same species, but that's as far as it goes. Don't know why the mainline Humans forgot about Earth but for Midgard it would be along the lines of "Never been, don't care, this is my home."

The history section is more OOC to explain the "who, where and why" of the system than things that would be known in universe.