Britain's Industrialization     The Industrial Revolution was an extended period of economic growth and change brought about by the application of mineral energy and t...

Benefits of Migration Why do animals migrate? One obvious answer is to escape cold weather by moving to a warmer region. Each fall, millions of monarch butterflies migrate southw...

题目： Submerged Plant Life:Surviving Underwater   Whereas a land plant expends a great deal of energy on the production of roots that can forage in the soil for vital water ...

TF阅读真题第835篇Sauropod Teeth and Nostrils

  Climate change has been linked to greenhouse gases in Earth's atmosphere that allow sunlight to reach the planet's surface while trapping the infrared energy that it emits...

TF阅读真题第856篇Irrigation and Early Civilizations

The Australlan Megatauna Extinctions Many of the species of large animals(megafauna) such as mammoths, mastodons, ground sloths, and giant deer that roamed the Earth tens of thous...

TF阅读真题第716篇Indus River Valley Civilization

  Sensory Ecology     Some of the most important sensory information animals have to process comes from other animals. Interactions between predators and prey, pare...

Agricultural Origins   It is tempting to think that people started domesticating plants and animals because hunting and gathering was laborious and then someone had the brilli...