It might simply be that giant lumbering sand worms just don't make good movie fodder. TREMORS was a good movie concerning giant worms but it was because they were very fast -- I mean it was just as silly because both ideas are physically impossible, but at least it wasn't boring.
And about the flying metal dragonflies. I know many sci-fi people don't care about physical properties and limitations, but I do, so when I see a large machine that can fly in the same way a dragonfly can, I just can't stand it. Dragonflies can fly because they are physically very small so have molecules in their bodies are large for their physical size. If you scaled a dragonfly up to the size of a helicopter, it would not be able to fly -- even the air it would be trying to displace would have far more molecules in it so it would be physically impossible, and this how in nature, bugs and small creatures can do all these crazy amazing things but large animals like elephants LUMBER about (for the most part). But take a hummingbird as an example. That design can only work on a VERY small bird. If you started scaling that up in size, it would very quickly fail which is why we don't have hovering around bird feeders.
Anyhow - there's a few of my beefs. The movie is impossible, and on top of that, it's just plain boring. It is good for putting you to sleep though -- I will give it that.
And about the flying metal dragonflies. I know many sci-fi people don't care about physical properties and limitations, but I do, so when I see a large machine that can fly in the same way a dragonfly can, I just can't stand it. Dragonflies can fly because they are physically very small so have molecules in their bodies are large for their physical size. If you scaled a dragonfly up to the size of a helicopter, it would not be able to fly -- even the air it would be trying to displace would have far more molecules in it so it would be physically impossible, and this how in nature, bugs and small creatures can do all these crazy amazing things but large animals like elephants LUMBER about (for the most part). But take a hummingbird as an example. That design can only work on a VERY small bird. If you started scaling that up in size, it would very quickly fail which is why we don't have hovering around bird feeders.
Anyhow - there's a few of my beefs. The movie is impossible, and on top of that, it's just plain boring. It is good for putting you to sleep though -- I will give it that.