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Date: 2009-12-04 02:21:55Planetary science Time Astrophysics Space science David Morrison Planet Risks to civilization humans and planet Earth Astronomy Space Astrobiology | Will the World End Before Finals? • The Mayan long calendar will partly ‘reset’, but the world will not end • ‘Doomsday’ rumors have beenAdd to Reading ListSource URL: dps.aas.orgDownload Document from Source WebsiteFile Size: 322,32 KBShare Document on Facebook |