Hear the haunting conch shells that helped rule the Andes long before the Incas

Three thousand years ago, a civilization ruled the Andes Mountains of South America. Not much is known about this pre-Incan civilization, but we do know beautifully decorated conch shells were played like musical instruments and used as parts of religious ceremonies. Now archaeologists and acousticians have teamed up… » 2/07/11 5:00pm 2/07/11 5:00pm