Just read the book. In some ways a masterpiece, I can't think of any other SF book I've ever come across which really handles humans encountering an alien life force so different as to be mutually incomprehensible. And moreover engendering all manner of philosophical, even semi-religious ideas amongst thinkers of its time, as well as jealousies, grievances, trends, whatever amongst it's scientific community.
I think both films lack a great deal when compared to the book, but I guess summaries of scientific treatises are bit hard to do on celluloid.