As a quick note, this article doesn't spoil major plot points but does discuss the major themes of the book and movie. The movie "The Martian," is based on Andy Weir's book of the same name, and ...

The film adaptation of "The Martian" keeps the bulk of the beloved science-heavy plot intact. 20th Century Fox But it does skip some important scenes and details in the book.

In a Q&A at the end of the book, Weir explains that he wanted to make the story as scientifically accurate as possible, but he needed the dust storm at the beginning to get the plot moving.