1) Mountains are formed through various geological processes, including tectonic plate movements, volcanic activity, and erosion.

2) The word "banana" contains three vowels: A, A, and A.

3) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

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