User blog comment:HarmonyBass/Destiny Ramblings: The Vex and why they haven't won yet. (WARNING! MIGHT GIVE YOU A HEADACHE!)/@comment-25932172-20170609014644/@comment-24510587-20170610172538

Allow me to quote Destinypedia:

"The Black Garden is a separate dimension not of any known space or time."

Ergo, not on Mars.

Furthermore, there is no source that claims that it is actually their birthplace. Merely that the Vex guard and tend to it, and that it grants them power.

And no, I never claimed or implied that. Our reality is the one we perceive and live in, and the Vex do not originate from this.