Wasted opportunity

Rating: 7/10 (21 January 2017)

The movie is average movie. I really like sci-fi movies about alien first contact.
The movie was scientific in the beginning. But, scenario became a little fuzzy and unrealistic in the second half.
The scenario problems:
1- Each sapient species has to have a grasping hand or something similar to build tools. So, the creatures in the movie should have evolved with grasping hands or something equal to that. The octopus like arms wouldn't work. Also, they need to have large brain relative to their body mass.
2- A creature having faster than light technology is like, cave men versus 21. century tanks. So, armies in the world should be more careful than the movie.
3- Understanding of a language can't make you see the future and past together. It's not a problem of understanding, it's a problem of the physics.
Movie started good, but it could be more realistic ending.