Cave discovery in Laos could unlock more about human evolution's biggest mystery CNNTooth from Laotian cave sheds light on enigmatic extinct humans msnNOWTooth of an Ancient Girl Fills Gap in Human Family Tree The New York TimesAncient tooth of mysterious Denisovan girl possibly found Livescience.comDenisovan tooth found in Laos adds new wrinkles to their story National GeographicView Full Coverage on Google News