The sauropod dinosaurs were gigantic, long-necked herbivores (plant eaters) that flourished during the Jurassic period (201-145 million years ago). At the same time that the saurop...

The special character of the Nile, which made it central to ancient Egyptian culture, was its annual inundation (flooding). During June the river began to rise, and a quantity of g...

TF阅读真题第707篇The Silk Makers

In Europe, rapid human population growth and the rise of agriculture toward the end of the first millennium had profound effects on freshwater fish, especially migratory fish like ...

  题目： Endangered Coral Reefs     Reef-building corals are made by polyps (tiny sea animals) that build on the skeletal remains of previous generations provid...

TF阅读真题第683篇The Solnhofen limestones and Archaeopteryx

TF阅读真题第729篇Forming the Building Blocks of Life

TF阅读真题第698篇European Cities and the Rise of Commerce

All planets in the solar system except Venus and Mercury have at least one moon orbiting them,with the two largest jovian (giant) planets,Jupiter and Saturn,each having over sixty....

Methane Hydrate as a Potential Fuel   At the bottom of the world's oceans lies a potential source of energy that could provide society with fuel well into the next century. Th...