The Roman Empire(31 B.C.E.-A.D. 476)， which conquered much of Europe, the Near East, and northern Africa, enjoyed great prosperity before facing economic decline in its later cent...

TF阅读真题第735篇The Role of Fragrance in Plant Pollination

TF阅读真题第704篇Air-Breathing Fishes

TF阅读真题第711篇Early Bantu Society

TF阅读真题第696篇The Northern Long-necked Turtle

TF阅读真题第700篇Canals and Railroads in the Early Nineteenth Century

TF阅读真题第726篇The Horse and the Camel in Early China

  Migratory birds are well known to navigate over long distances between feeding grounds and breeding sites, often over thousands of miles. Ornithologist G. V. T. Matthews dem...

Woody plants produce a great variety of chemical compounds to provide protection against other plants, diseases, and herbivores (plant-eating animals) big and small. These chemical...

TF阅读真题第706篇A Revolution in Consumption in the Eighteenth Century