Содержание
- 2. Caves were probably prehistoric man’s first shelter and home . In Europe , Africa and Asia
- 3. In some of these caves bones and skulls have been found belonging to the species homo.
- 4. How are caves formed ? Mainly by the action of water and glaciers , over thousands
- 5. It is surprising and mysterious , with its astonishing, multicolored stalactites and stalagmites, lakes and rivers
- 6. Speleologist , the scientific study of caves, is becoming ever more popular, as fascinating new discoveries
- 7. Man started studying caves long ago , around 1700 but it is only in this century
- 8. Lately, speleologists have begun anew kind of experiment; they are studying how the human body and
- 10. Скачать презентацию