There isn't much to know about Yggdrasill tbh. A couple of things and beings are located on, in or near it and Odin hanged himself there once. The tree itself is just a cool and large tree.
>Virgin: I m-majored in European h-history... I t-try to look at complex issues from several points of view and I use only t-trusted p-peer reviewed sources.
>Chad: Yeah, I take all my world knowledge from videogames and base my domestic and foreign politics understanding on imageboards banter. What's a book?