ThirstyFish

Squirrels are a large family of rodents that include, tree and ground squirrels, chipmunks, marmots and groundhogs, flying squirrels, and prairie dogs. The Eastern Gray Squirrel is native to the Eastern and Midwestern United States and is common to urban parks and backyards.

In Norse mythology, Ratatoskr is a squirrel that carries messages between an eagle perched on The World Tree (Yggdrasil) and Nidhogg, the dragon who gnaws at the deepest root of Yggdrasil.

Yggdrasil is the Norse version of the World Tree motif that can be found in Indo-European, Siberian and Native American religions. In many of these religions and cultures, the world tree is a colossal tree that connects heavens and earth, as well as the underground through its roots. It is suggested to be related to the more general concept of the Tree of Life which is an allusion to the idea of interconnectedness of life and the universe.

Those mathematically inclined may be interested in the unsolved Collatz Conjecture (Oneness).