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The russian's failed Phobos-Grunt giant Mars spaceprobe has a 11kg canister of Cobalt-57 on-board, probably for thermo-electric generation. It is about to impact Earth during January 2012, which makes the "Maya domesday" hypers pretty happy. The article could explain what are the expected consequences, if that co-57 canister hits a populated area. 82.131.210.163 ( talk) 09:42, 22 December 2011 (UTC)