TF阅读真题第694篇Formation of Earth's Atmosphere and Oceans

  When studying an archaeological site, archaeologists must first try to understand how the society that lived there was organized. Some societies are centrally organized, and...

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688篇Uniformitarianism and Earth's Cycles

The growing population of eighteenth-century Europe increased demand for cloth to clothe people. Urban merchants turned to rural people for additional, inexpensive labor: farming f...

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

Molt is the process in which birds shed feathers and replace them by growing new ones. It is a costly effort that typically follows breeding in the warmest months of the year and p...

TF阅读真题第730篇The Human Appendix

In the late 1970s, several research groups were trying to determine the cause of the boundary between the geological layers corresponding to the Cretaceous and Tertiary periods, ab...

TF阅读真题第727篇The Ecology of Kirtland's Warbler