20世纪末,网络开始改变人类生活方式。进入21世纪,整个世界发展的引擎可能会在三个领域产生:新材料、新能源和生物科技。美国国家航空航天局研制出一种新型气凝胶,由于密度只有每立方厘米3毫克,已作为“世界上密度最小的固体”正式入选《吉尼斯世界纪录》。这种气凝胶呈半透明淡蓝色,密度极小,因此人们也把它称为“固态烟”。这种如烟如雾般的固体正改变着我们的世界。 At the end of the twentieth century, the internet began to change the way of human life. Into the 21st century, the engine of development throughout the world may be generated in three areas: new materials, new energy and biotechnology. NASA has developed a new type of airgel that has officially entered the Guinness World Records as “the least dense solid in the world” due to its density of only 3 milligrams per cubic centimeter. This airgel is translucent pale blue, the density is very small, so people also call it “solid smoke.” This smoke-like solid is changing our world.