Interstellar is a great movie depicting what may likely be the future of humanity. However, the entire movie is a big buildup towards the black hole scene. before this the entire movie was entertaining, and made a lot of sense. But it was the black hole scene that was disappointing since it made no sense. The reason Cooper can communicate with Murph across many galaxies is because he loves her? and that some how he makes a connection throughout the galaxy? Even though this flaw is pretty big, the good outweighs the bad. The introduction of time and gravity as new dimensions, and the existence of 5 dimensional being is really interesting, making it well worth the time.