1) The Pacific Ocean is the largest ocean on Earth, covering more than 30% of the planet's surface.

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 first sound film, "The Jazz Singer," was released in 1927 and marked the transition from silent movies to "talkies."

4) The Appalachian Mountains, running along the eastern coast of the United States, are one of the oldest mountain ranges in the world.