The Greenhouse Effect on Venus   The nitrogen and oxygen gases that make up the bulk of Earth's atmosphere neither absorb nor emit thermal radiation, energy that is released f...

Animal Migration Patterns in the Serengeti   The Serengeti, a region in northern Tanzania, is the site of the largest mammal migration on Earth. Herds of wildebeest, zebras...

Building Materials in the Nineteenth Century       For most of the nineteenth century, European architects built in historical revival styles (styles that imitate ...

TF阅读题目合集：https://shimo.im/docs/Wr3DpZZKnwi1El3J/read     第1篇Grinding Grain http://www.tuonindefu.com/?p=719 第2篇Machines and Manufacturing http://www.t...

Dating Archaeological Objects     For contemporary archaeologists who need to know the age of any objects they study, perhaps the most precise and yet technologically ...

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 (...

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...

The History and Composition of Laundry Detergent     The earliest ancient people used plain water for cleaning. Water can dissolve different kinds of substances and then...

TF阅读真题第845篇Urbanization of Japan

The Search for the Origins of Writing     Who invented the first writing? Like many questions of its type in archaeology, this one is not easily answered. Some might arg...