We all saw it. We scratched our heads trying to figure out what the weird Monolith was in prehistoric Africa in front of the apes, then on the 21st century moon. Then the meaning of Hal 9000, then the old man dying, and finally the Star Child.
Here it is. THE LINK. If you're a space fanatic, you'll like this. If you didn't see Stanley Kubrick's 2001, then skip this video link of four pieces, I, II, III, IV!
Open the Pod Bay Doors, Hal. Hal?