Tulane professor John verano (IMAGE) Tulane University Caption Tulane professor John Verano is a co-author of a study about how interpersonal violence and warfare played a key role in the lives of ancient populations in northern Chile. Credit Helen Chavarria Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.