1) The world's most expensive car is the Bugatti La Voiture Noire, which sold for over $18 million.

2) The intensity of cyclones is often measured using the Saffir-Simpson Hurricane Wind Scale, which categorizes them based on their sustained wind speeds.

3) 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.

4) The concept of campaign finance refers to the funding and financial resources required to support political campaigns, including donations from individuals, organizations, and political action committees (PACs).