1) The Dead Sea, located between Jordan and Israel, is the lowest point on Earth's surface. Its saltwater is so dense that people can easily float on its surface.

2) In Norse mythology, the World Tree, known as Yggdrasil, is a massive ash tree that connects the nine realms of existence. It is considered the center of the cosmos and serves as a conduit between different realms, including Asgard (realm of the gods), Midgard (realm of humans), and Helheim (realm of the dead).

3) The tongue of a blue whale is so big that about 50 people could stand on it.

4) The FIFA Ballon d'Or is awarded annually to the best male football (soccer) player in the world, as voted by national team coaches, captains, and journalists.