'2024 Infrared signals are detected coming from the centre of the Galaxy, obviously the product of a technologically advanced civilisation. All attempts to decipher them fail.' —Arthur C. Clarke

Created by gwern on 2010-10-26; known on 2025-01-01

• gwern estimated 1% on 2010-10-26
• gwern said “http://www.arthurcclarke.net/?scifi=3” on 2010-10-26
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• themusicgod1 estimated 3% on 2016-10-07
• pranomostro estimated 0% on 2019-01-08
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