Answer:
What goes through a door but never goes in and never comes out?
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
You used to come to me for all sorts of information and knowledge before the internet was born
Everyone has me except for a few. You may not be able to identify me but I can always identify you. What am I?
I had a bright start but I couldn't take the pressure. I consume everything yet I don't eat anything.
What is lighter than what it is made of?