What Am I Riddles

Question: I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am i?

Question: I'm not dead i'm not alive, i'm not underground i'm high up in the sky, people speak of me but never saw me. Who am i?

Question: I'm the one that gives you information, I'm the one that lets you have the ability to control yourself, I'm the one that stores all memories and without me you'll be dead in a instant. What am I?

Question: What has four legs, breathes, but doesn't move?

Question: What devours everything from birds, to tree, bats, and bees? Surrounds you wherever you are, and is always moving?