Heinle/Cengage Learn
Ширина 142

Описание:
The Orinoco River is one of the longest rivers in the world. Many lives depend on this river. Many people, animals and plants live in or near the water. However, things are changing on the Orinoco. Why? What will happen to life on the Orinoco?

Описание:
Two National Geographic explorers take an exciting and difficult trip to the Gobi Desert. When they finally get there, one explorer wants to take pictures of the desert in an interesting way. Why is it so difficult to cross the desert? How does the explorer take pictures of the Gobi?

Описание:
Archaeologists study old cities and buildings to learn about cultures and people. An archaeologist in Guatemala has searched for one city for twenty years. He thinks the buildings there may tell him about one of the great cultures of the world: the Maya. Will he find the lost temples of the Maya?