In Norse mythology, the tree Yggdrasil is a central symbol representing the universe and its interconnectedness. Often described as a massive, sacred ash tree, it connects the nine realms of existence, including Asgard (home of the gods) and Midgard (home of humans). Yggdrasil is thought to hold the world's history and serve as a passageway between realms, representing the cyclical nature of life, death, and rebirth. Its roots and branches symbolize the stability of the cosmos, reminding us of the complexity and interdependence within the mythological landscape.