1) The Boston Celtics and the Los Angeles Lakers are the most successful teams in NBA history, with a combined total of 33 championships.

2) The musical "The Phantom of the Opera" has been running in London's West End since 1986, making it the longest-running musical in history.

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

4) The total length of your blood vessels can circle the Earth more than twice.