O:?

So I went and saw Avatar, which was about what I expected. Yes, I know I'm really late on the bandwagon, so I won't beat a dead horse and discuss what made it good or bad (generic and predictable, mostly). Instead I'm going to list all the scientifically and logically unsettling points I noticed. (Contains spoilers, if you're into that sort of thing.)

1) If the humans have to live in an all-oxygen environment in their buildings and such because the air on Pandora is unbreathable why were they allowed to smoke?

2) I guess I can understand how trees evolved on Pandora, but how did bamboo get there?

3) If the gravity on Pandora is lower than that of Earth's, how are the Na'vi stronger than humans? Taller, sure, but they wouldn't need to be proportionally stronger.

4) You know those floating mountains? Well, if unobtanium (apparently) floats it only follows that those mountains are filled with the stuff, so couldn't the humans just harvest those and avoid the whole destroying an entire civilization thing? Also who would buy something valued at $20000000/kilo, and why would someone even spend all the resources to mine something that costs that much? That's just economically stupid, I doublt they'd even break even.

5) If they were shooting at the front of the home tree how did it fall sideways?

6) There is no way we could develop the technology, discover and travel to the closest earth-like planet, thoroughly research it, establish a successful mining colony on it, and try to convert its natives to christianity and the American way in only 150 years.

7) There is no way that space shuttle thing was moving fast enough in the final battle thingy to stay in the air.

8) On a related note, if the bad guys were directly on target, as in directly above the magic tree thing, when the shuttle blew up, wouldn't it have still landed on the tree, or at least caught it on fire with the explosion?

9) I find it hard to believe that in the entire history of the Na'vi only 5 people ever figured out that to tame one of those flying red things all you have to do is attack it from above.

Finally, and most importantly:
10) You'd think that in 150+ years they'd have made a new noise for when a truck backs up.

That is all I can remember. I have no problem with how the avatar machines work, though. Those are neat.