In Norse mythology, the tree that connects the nine worlds is known as Yggdrasil. This immense and central ash tree serves as the cosmological framework, linking different realms such as Asgard (home of the gods), Midgard (home of humans), and Hel (realm of the dead). Yggdrasil symbolizes the interconnectedness of all existence and the cyclical nature of life, death, and rebirth. Its significance is underscored by the various beings and events, such as the Norns, who shape destiny, revealing the profound themes within Norse mythology.