1) The Arctic Ocean is the smallest and shallowest ocean, located at the North Pole. It is covered by sea ice for much of the year.

2) The word "orange" contains three vowels: O, A, and E.

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