It's called the planet of "Earth", FYI.
"Terra" means "Earth", which is why the humans are called "Terrans"; they're of Earth.
Secondly, that makes no

ing sense.
Thirdly, the Zerg have a hivemind.
They have no self consciosnes.
Atleast, the soldiers don't have enough of one to be considered sentient.
"Doctor"?
I have but 1 suggestion:
DONT BASE IT OFF THE ZERG.
Make-up your own race so it doesn't look stupid and weird and like something some trekky 5-year old would think of.
And I mean that seriously, not offensively, it sounds like a 5-year-old's idea.
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I'm sorry, but I'm gonna have to agree with Ez. Get a real storyline.