1) The word "flower" contains two vowels: O and E.

2) The novel "To Kill a Mockingbird" by Harper Lee has been translated into more than 40 languages and has sold over 40 million copies worldwide.

3) The game of rugby originated at Rugby School in England and has since evolved into different versions, including Rugby Union and Rugby League.

4) A single bolt of lightning can heat the surrounding air to temperatures five times hotter than the surface of the sun.