Extraterrestrial lmpact and Megafauna Extinctions     About 13,000 years ago, near the end of a period called the Pleistocene, North America was populated by megafauna (...

The Global Industrial Revolution   题目：   In fewer than a hundred years, the global process of industrialization utterly transformed Great Britain, most of continenta...

A Cat's Sense of Smell     题目： Cats have sensitive noses that they use for a variety of purposes, including finding mates and identifying the territory of other cats...

TF阅读真题第844篇Climate Change and Species Distribution

TF阅读真题第824篇Asphalt

TF阅读真题第839篇Money in the European Middle Ages

Animal Farming in the Chesapeake Colonies The Chesapeake colonies were established by English settlers near Chesapeake Bay in North America in the seventeenth century. Tobacco pr...

TF阅读真题第840篇Rogue Planets

题目： Gordon Childe and the Neolithic Revolution   V. Gordon Childe (1892-1957) was one of the most influential archaeologists of the twentieth century, perhaps best known f...

  Archaeoptertx and Flight 题目： It is not known whether Archaeopteryx, the earliest birdlike creature for which fossils have been found, could fly-but it probably did, at ...