I am trying to find a movie I saw when I was a kid. I am 38 years old.
It was about a ship (kind of an airplane) and this ship has sections; each section will have something. I remember one section having some kind of insects, and when the people were going over each section, they would release what was there, so they released the insects into the world.
The last section of the ship had, in ice, some kind of creature and the movie made a big deal of it, like the existence of it shouldn't be possible and it was the end of the world.