Youcantellalotaboutpeoplebylookingattheirhair–notjustwh...
問題詳情：Youcantellalotaboutpeoplebylookingattheirhair–notjustwhethertheybrush,sprayorblow-dry.Scientistshavefoundawaytousehairtofigureoutwhereapersonisfromandwherethatpersonhasbeen.Thefindingcouldhel...