Heathasbeenusedtocontrolhairforhundredsofyears.Buthowmu...
問題詳情：Heathasbeenusedtocontrolhairforhundredsofyears.Buthowmuchistoomuch?Ifyou’veeveropenedaveryhotoven,youknowthatheatcanburnyoureyebrowsoffyourfaceveryquickly.AscientistfromPurdueUniversityinIndi...