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 Edelweiss flower, found in the European Alps, is known for its beauty and is often associated with mountaineering and alpine culture.

3) The Southern Ocean surrounds Antarctica and is the coldest and least-visited ocean.

4) Bats are the only mammals capable of sustained flight.