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

2) The longest-running TV show in history is "The Simpsons," which has been on the air since 1989 and has over 700 episodes.

3) The fingerprints of koalas are so similar to humans that they have been mistaken at crime scenes.

4) The International Monetary Fund (IMF) and the World Bank are international financial institutions that work to promote global financial stability and economic development.