ancient south america
Archaeology
ayahuasca
Bolivia
cocaine
mass spectrometry
Pre-Columbian civilizations
Science
South American archaeology
Tiwanaku
Ancient Bolivian ritual kit contains traces of hallucinogens
Enlarge / This is a view of the Cueva del Chileno excavation site. (credit: José Capriles, Penn State) In a rock shelter in the highlands of southwest Bolivia amid the…