剧情介绍
MichaelMosleyexploresthelatestscienceabouthowourpersonalitiesarecreated-andwhethertheycanbechanged.Despiteappearances,Mosleyisapessimistwhoconstantlyfretsaboutthefuture.Hewantstoworrylessandbecomemoreofanoptimist.Hetriesouttwotechniquestochangethisaspectofhispersonality-withsurprisingresults.Andhetravelstothefrontie...