1 - The space Age commenced in October, 1957, when Sputnik, the first artificial satellite was launched by the Soviet Union.

2 - There have been attempts over the past few hundred years 10 create an artificial language which could be used for international communication.

3 - Artificial diamonds have been produced by heating and compressing carbon in the form of graphite or carbon-containing compounds such as carbohydrates.

4 - Though artificial fertilizers ensure high crop-yields, their environmental consequences are very disturbing.

5 - Surveys have shown that large sections of the community are content that the dentist can fit them artificial teeth, and they show little interest in conservative treatment.