1) 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.

2) The assassination of Archduke Franz Ferdinand of Austria in 1914 triggered the start of World War I.

3) 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.

4) Taylor Swift is an American singer-songwriter known for her narrative songwriting, catchy pop tunes, and successful albums such as "Fearless," "1989," and "folklore." She has won numerous awards, including Grammy Awards, and has a dedicated fan base worldwide.