科学美国人60秒 SSS 2014-09-24（在线收听）

 Some scientists say that the use of fire helps to make us the modern humans it dramatically changed what and how we eat or may have even altered our enemy. But the University of Utah anthropologist Polly Wisner thinks that the fire is also important in shaping human social interactions and cultural traditions. Her conclusions are on the Preceding of the National Academy Sciences. Wisner evaluated day and night activities and conversations accord Harry Bushman from Botswana and Namibia. These communities still live by hunting and gathering as most humans did over the evolutionary history. During the day, nearly a third of the conversations dealt with the economic issues, such as hunting strategies and faring region plans, another third covered complains, criticisms and ... but at night around fire, more than 80% group conversations were story-telling often about the people living far way boring the spiral world. Wisner says that humans are unique in that we create ties to others outside of our media groups. Gathering at fire expanded listeners' imaginations and allowed for the development of cognates of the processes that make it possible for Muslims to distinct communities which makes fire the quicker of the FaceBook.