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At the end of District 9, it transpires that

all the alien mothership needs is some of that black juice, and then it starts working again.

Given that all the alien technology came from the mothership in the first place, why didn't they just do that right at the start? Why did they even stop at Earth?

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There are a lot of secrets in District 9... –  Jack B Nimble Dec 5 '12 at 22:51

2 Answers 2

up vote 5 down vote accepted

From what I recall the alien said it had taken it all that time (~20 years) to create the amount needed.

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Unless I'm mistaken the 'scientist' alien knows this all along, and has been searching for the black fluid all this time.

Remember when the ship first arrives and humans explore it they find what they described as two castes, the warrior/worker ones far outnumbering the other smarter kind (or I am mistaken and they feel they are only the soldier caste, and the smarter leaders must have left).

So no one, no one at all is looking for the black goo in the whole of district 9, as the lone scientist is the only one who knows enough to do anything about it.

Further more the scientist alien needs to get up to the ship anyway, and open it up. I remember they need the goo to do that too. So there could have been gallons on the mother ship, but none on the ground.

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