美国的天文学和空间学权威学者卡尔·萨根在其名著《人类智力进化推测》一书中写道:“大脑两半球的协调活动,是大自然赋予我们生存者的工具.如果我们不能创造性地全面运用人类智慧,我们就未必能够生存下去.”人类的生存、发展,与能否很好地运用大脑关系最大.这是大家越来越清楚的. Karl Sagan, the authoritative scholar of astronomy and space science in the United States, wrote in his famous book, “The Evolution of Human Intelligence,” that “the coordination of the two hemispheres in the brain is a tool that nature gives us to survive.” If we can not be creative We will not necessarily be able to survive if we make full use of human wisdom. "It is becoming clearer and clearer that the survival and development of mankind are most closely related to the ability to use the brain well.