The Thing Movie

The movie titled "The thing" is based on the Book called 'Who Goes there' by John Campbell. In the '80s version of the film, there are some differences from the book. In the book, the alien wasn't discovered by a separate Norwegian expedition. It was discovered by the same crew. 

Image generated by artificial intelligence 

In the book the alien has a default form, a creature with a humanoid shape and three red eyes. The creature also has tentacles in it's hair. In the book the creature doesn't need to eat or breathe because it has cold fusion proteins, the cells can get energy directly from water molecules by splitting it and fusing hydrogen. In the movie this ability is never exposed. The book also mentions that the cells of the organism are identical from the victim cells except for the nucleus. Most of the science is cut out of the movie.