UFO Timeline
Arthur C Clarke's short story "The Sentinel" was published in 1951. It has also been published under the title “Sentinel of Eternity”.
It was the inspiration for the movie "2001: A Space Odyssey”.
Arthur C Clarke's short story "The Sentinel" was published in 1951. It has also been published under the title “Sentinel of Eternity”.
It was the inspiration for the movie "2001: A Space Odyssey”.