Huginn and Muninn Fly every day Over all the world; I worry for Huginn That he might not return, But I worry more for Muninn
- Odin, in the Eddic poem Grímnismál
Huginn and Muninn were two mythical ravens that were sent out by Odin to fly around the world every day. They would return by breakfast, whispering what they had seen into his ear. Thus, he learns many things.