Vote for the best science fiction and fantasy stories of the 20th and 21st centuries!

Which books and stories are the greatest works of science fiction of the past 112 years? Now is the time for the ultimate decision. Locus Magazine is having a monster poll to decide the best science fiction and fantasy novels, novellas, novelettes and stories of the 20th and 21st centuries! Use this great power wisely, because you are safeguarding the legacy of a genre. [via Whatever]

Top image: cover to Voyage of the Space Beagle by A.E. Van Vogt, art by Clyde Caldwell