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John Tyndall (2 Aug 1820 #Leighlinbridge #Carlow-4 Dec 1893). Proved CO2/Greenhouse Effect link. Explained why sky blue in day/red sunset; "Tyndall Effect"! >12 science books; brought physics to wide audience. Prof Physics @Ri_Science. Keen climber Alps. https://t.co/SuINhshoA9