Inaworldperfumedbyfreshlypoppedpopcornandexhaustfumes,whereseabreezescanminglewiththescentsofsweetflowersorwetpaint,newresearchshowsthathumansarecapableofdiscriminatingatleastonetrilliondifferentodors.HowardHughesMedicalInstitute(HHMI)scientistsdeterminedthatoursenseofsmellispreparedtorecognizethisvastolfactory(嗅觉的)palette(调色板)aftertestingindividualsabilitytorecognizedifferencesbetwee...