1. What is the biggest desert in the globe?
2. How many elephants does Mamadou have to move?
3. How long has it been since it rained in the Sahara?
4. How big is the Sahara?
5. What are the Tubu women looking for?
6. Among the Tubu, who are considered the great "navigators"?
7. Where does the snow in the Gobi desert in Mongolia come from?