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

2) Norse mythology, originating from the Scandinavian region, features gods and mythical creatures like Odin, Thor, Loki, and Valkyries. It explores themes of heroism, destiny, and the battle between gods and giants, with intricate tales recorded in texts such as the Prose Edda and Poetic Edda.

3) Insurance fraud occurs when individuals or organizations deliberately deceive insurance companies to receive undeserved benefits.

4) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).