Dogshavelongbeendependablecompanionsbyoursides.Butitwasn’talwaysthatway,andalookattheirclosestlivingrelative,thewolf,makesitclearwhy.Researchintodogdomesticationandintelligenceofferscluesintothehuman-dogrelationship.Andanalyzingdogs’brainactivityandgenesmayevenhelpanswerwhetherdogsareinitforthefood—oriftheyreallyloveus.