Ontheir100thanniversary,thestoryoftheextraordinaryscientificexpeditionsthatusheredintheeraofrelativityIn1919,BritishscientistsledextraordinaryexpeditionstoBrazilandAfricatotestAlbertEinstein’srevolutionarynewtheoryofgeneralrelativityinwhatbecamethecentury’smostcelebratedscientificexperiment.TheresultusheredinaneweraandmadeEinsteinaglobalcelebritybyconfirminghisdramaticpredictionthatthepathoflightrayswouldbebentbygravity.Today,Einstein’stheoryisscientificfact.Yettheeffortto“weighlight“bymeasuringthegravitationaldeflectionofstarlightduringtheMay29,1919,solareclipsehasbecomecloudedbymythandskepticism.CouldArthurEddingtonandFrankDysonhavegottentheresultstheyclaimed?DidthepacifistEddingtonfalsifyevidencetofosterpeaceafterahorrificwarbyvalidatingthetheoryofaGermanantiwarcampaigner?InNoShadowofaDoubt,DanielKennefickprovidesdefinitiveanswersbyofferingthemostcomprehensiveandauthoritativeaccountofhowexpeditionscientistsovercamewar,badweather,andequipmentproblemstomaketheexperimentatriumphantsuccess.ThereaderfollowsEddingtononhisvoyagetoAfricathroughhislettershome,anddelveswithDysonintohowthecomplexexperimentwasaccomplished,throughhisnotes.OthercharactersincludeHowardGrubb,thebrilliantIrishmanwhomadetheinstruments;WilliamCampbell,theAmericanastronomerwhoconfirmedtheresult;andErwinFindlay-Freundlich,theGermanwhoseattemptstoperformthetestinCrimeawerefoiledbycloudsandhisarrest.Bychroniclingtheexpeditionsandtheirenormousimpactingreaterdetailthaneverbefore,NoShadowofaDoubtrevealsastorythatisevenricherandmoreexcitingthanpreviouslyknown.
