1) 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).

2) The Pacific Ocean is the largest ocean on Earth, covering more than 30% of the planet's surface.

3) The corpse flower, or titan arum, is known for its unpleasant smell, often compared to that of rotting flesh.

4) The Indian Ocean is the third-largest ocean and is characterized by its warm waters and diverse marine life.