1) The Mariana Trench in the western Pacific Ocean is the deepest part of the world's oceans, reaching a depth of approximately 36,070 feet (10,994 meters).

2) The Dead Sea, located between Jordan and Israel, is the lowest point on Earth's surface. Its saltwater is so dense that people can easily float on its surface.

3) The world's first credit card was introduced in 1950 by Diners Club.

4) The discovery of the Americas by Christopher Columbus in 1492 opened up new trade routes and had a profound impact on world history.