documentary – n. a movie or television program that tells the facts about actual people and events

microscopic – adj. able to be seen only through a microscope : extremely small

3D – adj. made in a way that causes an image to appear to be three-dimensional (with length, width and depth)

tiny – adj. very small

sustain – v. to provide what is needed for (something or someone) to exist, continue, etc.

desalination – n. to remove salt from (something, such as water)