1) The game of baseball, often referred to as "America's pastime," is played between two teams of nine players and has a rich history dating back to the 18th century.

2) The word "umbrella" contains three vowels: U, E, and A.

3) The Treaty of Tordesillas, signed in 1494, divided the newly discovered lands outside of Europe between Spain and Portugal, leading to the colonization of the Americas.

4) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.