Kalahari Bushmen (IMAGE) University of Utah Caption !Kung Kalahari Bushmen in Africa sit in camp. A University of Utah study of nighttime gatherings around fires by these hunter-gatherers suggests that human cultural development was advanced when human ancestors started telling stories around the fire at night to reinforce social traditions, promote harmony and spark the imagination. Credit Polly Wiessner, University of Utah. Usage Restrictions None License Licensed 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.