Heathasbeenusedtocontrolhairforhundredsofyears.Buthowmu...
问题详情：Heathasbeenusedtocontrolhairforhundredsofyears.Buthowmuchistoomuch?Ifyou’veeveropenedaveryhotoven,youknowthatheatcanburnyoureyebrowsoffyourfaceveryquickly.AscientistfromPurdueUniversityinIndi...