In honor of the 50th anniversary of 2001: A Space Odyssey, we make our picks for the best cerebral science fiction films of all time. Here are the top ten picks!

Our countdown of the 100 best films of the 21st century continues. This is Part 2 #75 through 51.

Unless the film can get a big enough star, the future of Gravity is in doubt.  But does a recent script review indicate that  the film is much more ambitious then ever imagined?  Will this potentially groundbreaking film ever have a chance on hitting the big screen?