Youcantellalotaboutpeoplebylookingattheirhair–notjustwh...
问题详情：Youcantellalotaboutpeoplebylookingattheirhair–notjustwhethertheybrush,sprayorblow-dry.Scientistshavefoundawaytousehairtofigureoutwhereapersonisfromandwherethatpersonhasbeen.Thefindingcouldhel...