THE ENDING
I apologize in advance because there are probably several other threads pertaining to the ending, but I found this bit about Kubrick explaining the ending:
https://www.indiewire.com/2018/07/2001-a-space-odyssey-stanley-kubrick-explains-ending-video-1201981455/
Sounds really cool. The problem is Kubrick didn't execute the beginning sequence or the ending sequence of the movie well. The novel apparently explains it a lot better and talks about the "zoo". The novel also explains the beginning a LOT better about the monolith helping with the evolution of man moving things along. I didn't think that was clear in the movie. If the beginning and ending had a little bit more clarity, this movie really would be genius. I know there had been plans for a series. I think that would be really cool to see if they were able to go into more depth and explore it all further.