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

2) Antarctica is the coldest, driest, and windiest continent on Earth. It is also the highest, with an average elevation of about 7,545 feet (2,300 meters).

3) The longest English word is "pneumonoultramicroscopicsilicovolcanoconiosis," which refers to a lung disease caused by inhaling very fine silica dust.

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