TF阅读真题第848篇Wool production in Europe on the high Middle Ages

TF阅读真题第834篇Group living

TF阅读真题第806篇Maya Population in the Classic Period

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

Early Food Production in Africa   Farming appeared in Africa by 5000 B.c.E. Eventually, several different styles of food production developed. These variations were caused by ...

Tidal Heating on lo     To understand tidal heating, we must go back to when the twin spacecraft Voyager 1 and Voyager 2 made close flybys of the moon lo, Jupiter's clos...

TF阅读真题第853篇Climate and the Ancient Sahara

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...

Mycorrhizae     Fungi are organisms, including mushrooms, yeasts, and molds, that absorb and decompose organic material. Most land plants have specialized roots that con...

TF阅读真题第814篇Agriculture in Colonial New England