1) The book series "The Chronicles of Narnia" by C.S. Lewis has sold over 100 million copies worldwide.

2) The Age of Exploration, during the 15th and 16th centuries, saw European explorers such as Christopher Columbus and Vasco da Gama reach new lands and establish trade routes.

3) Improved meteorological forecasting and early warning systems have significantly contributed to better preparedness and mitigation efforts for cyclones, reducing the loss of life and property.

4) The word "mountain" contains three vowels: O, U, and A.