1) The Hollywood Walk of Fame features more than 2,690 stars embedded in the sidewalk, honoring notable figures in the entertainment industry.

2) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.

3) The world's largest particle accelerator, the Large Hadron Collider, is located near Geneva, Switzerland, and spans a circumference of 17 miles (27 kilometers).

4) The insurance industry is one of the oldest industries in the world, with roots dating back thousands of years.