1) J.K. Rowling's "Harry Potter" series of books has sold over 500 million copies worldwide and has been translated into 80 languages.

2) The world's oldest university, Al-Qarawiyyin, was founded in 859 AD and is located in Fez, Morocco.

3) The word "table" contains two vowels: A and E.

4) The European Union (EU) is a supranational organization comprising 27 member states that cooperate on various issues, including trade, economic integration, and common policies, while preserving individual national sovereignty.