Compositions   1842: Nabucco 1844: Ernani 1851: Rigoletto 1853: Il Trovatore 1853: La Traviata 1859: Un Ballo in Maschera 1862: La Forza del Destino 1871: Aida 1887: Otello 1893: Falstaff	Science 1839: Daguerre: Early photography           1859: Darwin: Origin of Species   1876: Bell: Telephone     1895: Marconi: Radio