For nearly six centuries, scientists have been documenting the plants and fungi of the world through herbaria. The wealth of specimens available today, carefully preserved through the centuries, is a unique source of data that not only helps scientists understand how the world's vegetation has changed over time, but also allows them to predict how it will change in the future. ...(展开全部)

As our earliest ancestors migrated out of Africa, they encountered entirely new floras. By sampling these, they found plants that appeared to (and sometimes did) heal wounds, cure maladies, and ease troubled minds. This process of discovery continues today, as multinational pharmaceutical companies bioprospect in the globe's remaining wild places for the next tamoxifen or digit...(展开全部)

As our earliest ancestors migrated out of Africa, they encountered entirely new floras. By sampling these, they found plants that appeared to (and sometimes did) heal wounds, cure maladies, and ease troubled minds. This process of discovery continues today, as multinational pharmaceutical companies bioprospect in the globe's remaining wild places for the next tamoxifen or digit...(展开全部)

"An Introduction to the World's Oceans, Tenth Edition", is an introductory oceanography text intended for students without a background in mathematics, chemistry, physics, geology, or biology. It emphasizes the role of basic scientific principles in helping understand the processes that govern the ocean and the earth. To keep the text as current as possible, the authors conduct...(展开全部)

"An Introduction to the World's Oceans, Tenth Edition", is an introductory oceanography text intended for students without a background in mathematics, chemistry, physics, geology, or biology. It emphasizes the role of basic scientific principles in helping understand the processes that govern the ocean and the earth. To keep the text as current as possible, the authors conduct...(展开全部)

xn + yn = zn, where n represents 3, 4, 5, ...no solution "I have discovered a truly marvelous demonstration of this proposition which this margin is too narrow to contain." With these words, the seventeenth-century French mathematician Pierre de Fermat threw down the gauntlet to future generations.What came to be known as Fermat's Last Theorem looked simple; proving it, howev...(展开全部)

His goal—to prevent every disease that commonly attacked children—was unattainable. But Maurice Hilleman came close. Maurice Hilleman is the father of modern vaccines. Chief among his accomplishments are nine vaccines that practically every child gets, rendering formerly deadly diseases—including mumps, rubella, and measles—nearly forgotten. Author Paul A. Offit's rich and ...(展开全部)

His goal—to prevent every disease that commonly attacked children—was unattainable. But Maurice Hilleman came close. Maurice Hilleman is the father of modern vaccines. Chief among his accomplishments are nine vaccines that practically every child gets, rendering formerly deadly diseases—including mumps, rubella, and measles—nearly forgotten. Author Paul A. Offit's rich and ...(展开全部)

吉纳维芙·冯·佩金格尔（Genevieve von Petzinger） 加拿大古人类学家、岩画研究专家，专注于对欧洲冰河世纪早期（约4万到1万年前）岩画遗址中几何图形的研究，她利用从欧洲400多处史前遗址收集来的5000多个符号，建立起了一个独一无二的数据库。2011年成为TED全球研究员，2013-2015年当选TED高级研究员，2016年被选为美国《国家地理》“新晋探险家”，作品见于《新科学家》《科学画报》等科普杂志。她于2015年发表的TED演讲已有超过650万人次观看。

吉纳维芙·冯·佩金格尔（Genevieve von Petzinger） 加拿大古人类学家、岩画研究专家，专注于对欧洲冰河世纪早期（约4万到1万年前）岩画遗址中几何图形的研究，她利用从欧洲400多处史前遗址收集来的5000多个符号，建立起了一个独一无二的数据库。2011年成为TED全球研究员，2013-2015年当选TED高级研究员，2016年被选为美国《国家地理》“新晋探险家”，作品见于《新科学家》《科学画报》等科普杂志。她于2015年发表的TED演讲已有超过650万人次观看。