1) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).

2) The Amazon Rainforest, located in South America, is the largest tropical rainforest in the world, covering an area of approximately 5.5 million square kilometers (2.1 million square miles). It is known for its exceptional biodiversity and plays a crucial role in the global ecosystem.

3) The insurance industry employs a wide range of professionals, including underwriters, actuaries, claims adjusters, and insurance agents.

4) The Earth's core is hotter than the surface of the Sun.