“2061 Halley's Comet returns – first landing by humans, And the sensational discovery of both dormant and active life forms vindicates Wickramasinghe and Hoyle's century-old hypothesis that life exists through space.” —Arthur C. Clarke

Created by gwern on 2010-10-26; known on 2062-01-01

• gwern estimated 2% on 2010-10-26
• gwern said “http://www.arthurcclarke.net/?scifi=3” on 2010-10-26
• kallman estimated 5% and said “Though we probably treat it like a heritage site, and doubt landing is appropriate term.” on 2010-11-22
• JoshuaZ estimated 2% on 2011-01-01
• Anubhav estimated 1% on 2011-10-12
• themusicgod1 estimated 3% on 2016-10-07
• pranomostro estimated 5% on 2019-01-08