TF阅读真题第813篇when honeybees become foragers

The Role of Climate Change and Ecology in History   A popular activity of historians and nonhistorians alike has long been to try to associate historical developments with cha...

Reconstructing the Spread of the Grain Weevil Perhaps the most common, most widespread, and arguably most destructive pest of stored grain in history is the grain weevil Sitophilu...

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

题目： Magma   Magma is a mixture of molten (melted)and semi-molten rock and other solids found beneath Earth's surface.Melting in Earth requires very specific conditions:the...