I'm still perplexed by the reproductive cycle of the Navi.
There's one character whose birth is a mystery through the whole movie....
They show Navi women pregnant and they look like pregnant humans. I even think there was a shot or two of umbilical cords. All very mammalian traits. (Along with nipples, evident on the male Navi but always conveniently hidden on the females. And since they don't have nips lining their chests, I assume they only have one baby at a time, and not a litter.)
Then there's the genetic mutation of the human/Navi hybrids having five fingers instead of four. But if that's from human DNA...whose DNA is it? I don't think twins share the same DNA 100%, so like I said before, the kids running around on Pandora are really Jake's brother's kids cause he's in his brother's DNA-cloned body.
And in the first movie, we see that they attach their ponytails to have "sexual relations" but it's not clear at all if that's how they reproduce. That might just be for recreational purposes.
And before you accuse me of overthinking it, you KNOW Cameron has an illustrated notebook that goes over every little detail of Navi physiology from birth to death, and he's had it all planned out to the letter since the mid 90s. That's the kinda dude he is. He's actually a very decent artist, both with organic and mechanical designs, as seen in the book "Tech Noir: The Art of James Cameron."
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