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

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....

TF阅读真题第684篇Escape Mechanisms of Ypsolopha Dentella

It is now generally accepted that dinosaurs (and large numbers of other animals and plants) went extinct about 65 million years ago, when Earth was hit by a giant asteroid (a rocky...

TF阅读真题第685篇The Medieval Agricultural Revolution

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...

TF阅读真题第719篇Did a Volcano Destroy the Minoan Civilization?

TF阅读真题第728篇Europe's Economic Recovery in the Fifteenth Century

TF阅读真题第705篇Freehold Society in Colonial New England

TF阅读真题第688篇Uniformitarianism and Earth's Cycles